From b1b69b03b35022c6c9dfb8f4b9c1ace8f1baf5be Mon Sep 17 00:00:00 2001
From: Alexander Early <alexander.early@reddit.com>
Date: Thu, 5 Aug 2021 16:20:34 -0700
Subject: [PATCH] regen docs

---
 docs/v3/apply.js.html           |    2 +-
 docs/v3/applyEach.js.html       |    2 +-
 docs/v3/applyEachSeries.js.html |    2 +-
 docs/v3/asyncify.js.html        |    2 +-
 docs/v3/auto.js.html            |    2 +-
 docs/v3/autoInject.js.html      |    2 +-
 docs/v3/cargo.js.html           |    2 +-
 docs/v3/cargoQueue.js.html      |    2 +-
 docs/v3/compose.js.html         |    2 +-
 docs/v3/concat.js.html          |    2 +-
 docs/v3/concatLimit.js.html     |    2 +-
 docs/v3/concatSeries.js.html    |    2 +-
 docs/v3/constant.js.html        |    2 +-
 docs/v3/detect.js.html          |    2 +-
 docs/v3/detectLimit.js.html     |    2 +-
 docs/v3/detectSeries.js.html    |    2 +-
 docs/v3/dir.js.html             |    2 +-
 docs/v3/doUntil.js.html         |    2 +-
 docs/v3/doWhilst.js.html        |    2 +-
 docs/v3/docs.html               |    6 +-
 docs/v3/each.js.html            |    2 +-
 docs/v3/eachLimit.js.html       |    2 +-
 docs/v3/eachOf.js.html          |    2 +-
 docs/v3/eachOfLimit.js.html     |    2 +-
 docs/v3/eachOfSeries.js.html    |    2 +-
 docs/v3/eachSeries.js.html      |    2 +-
 docs/v3/ensureAsync.js.html     |    2 +-
 docs/v3/every.js.html           |    2 +-
 docs/v3/everyLimit.js.html      |    2 +-
 docs/v3/everySeries.js.html     |    2 +-
 docs/v3/filter.js.html          |    2 +-
 docs/v3/filterLimit.js.html     |    2 +-
 docs/v3/filterSeries.js.html    |    2 +-
 docs/v3/forever.js.html         |    2 +-
 docs/v3/global.html             |    2 +-
 docs/v3/groupBy.js.html         |    2 +-
 docs/v3/groupByLimit.js.html    |    2 +-
 docs/v3/groupBySeries.js.html   |    2 +-
 docs/v3/index.html              |    3 +-
 docs/v3/index.js.html           |    2 +-
 docs/v3/log.js.html             |    2 +-
 docs/v3/map.js.html             |    2 +-
 docs/v3/mapLimit.js.html        |    2 +-
 docs/v3/mapSeries.js.html       |    2 +-
 docs/v3/mapValues.js.html       |    2 +-
 docs/v3/mapValuesLimit.js.html  |    2 +-
 docs/v3/mapValuesSeries.js.html |    2 +-
 docs/v3/memoize.js.html         |    2 +-
 docs/v3/module-Collections.html |    6 +-
 docs/v3/module-ControlFlow.html |    2 +-
 docs/v3/module-Utils.html       |    2 +-
 docs/v3/module-async.html       |    2 +-
 docs/v3/nextTick.js.html        |    2 +-
 docs/v3/parallel.js.html        |    2 +-
 docs/v3/parallelLimit.js.html   |    2 +-
 docs/v3/priorityQueue.js.html   |   11 +-
 docs/v3/queue.js.html           |    2 +-
 docs/v3/race.js.html            |    2 +-
 docs/v3/reduce.js.html          |    5 +-
 docs/v3/reduceRight.js.html     |    4 +-
 docs/v3/reflect.js.html         |    2 +-
 docs/v3/reflectAll.js.html      |    2 +-
 docs/v3/reject.js.html          |    2 +-
 docs/v3/rejectLimit.js.html     |    2 +-
 docs/v3/rejectSeries.js.html    |    2 +-
 docs/v3/retry.js.html           |    2 +-
 docs/v3/retryable.js.html       |    2 +-
 docs/v3/scripts/async.js        | 1502 +++++++++++++++++++++++++++----
 docs/v3/seq.js.html             |    2 +-
 docs/v3/series.js.html          |    2 +-
 docs/v3/setImmediate.js.html    |    2 +-
 docs/v3/some.js.html            |    2 +-
 docs/v3/someLimit.js.html       |    2 +-
 docs/v3/someSeries.js.html      |    2 +-
 docs/v3/sortBy.js.html          |    2 +-
 docs/v3/timeout.js.html         |    2 +-
 docs/v3/times.js.html           |    2 +-
 docs/v3/timesLimit.js.html      |    2 +-
 docs/v3/timesSeries.js.html     |    2 +-
 docs/v3/transform.js.html       |    2 +-
 docs/v3/tryEach.js.html         |    2 +-
 docs/v3/unmemoize.js.html       |    2 +-
 docs/v3/until.js.html           |    2 +-
 docs/v3/waterfall.js.html       |    2 +-
 docs/v3/whilst.js.html          |    2 +-
 85 files changed, 1440 insertions(+), 253 deletions(-)

diff --git a/docs/v3/apply.js.html b/docs/v3/apply.js.html
index 2943566e9..20591a3bd 100644
--- a/docs/v3/apply.js.html
+++ b/docs/v3/apply.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/applyEach.js.html b/docs/v3/applyEach.js.html
index 60a2c113f..a27d87a35 100644
--- a/docs/v3/applyEach.js.html
+++ b/docs/v3/applyEach.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/applyEachSeries.js.html b/docs/v3/applyEachSeries.js.html
index aa3decb25..9a34f6289 100644
--- a/docs/v3/applyEachSeries.js.html
+++ b/docs/v3/applyEachSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/asyncify.js.html b/docs/v3/asyncify.js.html
index 65ce37d38..5d01b0126 100644
--- a/docs/v3/asyncify.js.html
+++ b/docs/v3/asyncify.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/auto.js.html b/docs/v3/auto.js.html
index a1d65dbc5..2454383b1 100644
--- a/docs/v3/auto.js.html
+++ b/docs/v3/auto.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/autoInject.js.html b/docs/v3/autoInject.js.html
index 937eb99d0..57091d326 100644
--- a/docs/v3/autoInject.js.html
+++ b/docs/v3/autoInject.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/cargo.js.html b/docs/v3/cargo.js.html
index 451b0bfcd..1fa290099 100644
--- a/docs/v3/cargo.js.html
+++ b/docs/v3/cargo.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/cargoQueue.js.html b/docs/v3/cargoQueue.js.html
index f406af36a..23adb221b 100644
--- a/docs/v3/cargoQueue.js.html
+++ b/docs/v3/cargoQueue.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/compose.js.html b/docs/v3/compose.js.html
index 94e4f4625..151b86440 100644
--- a/docs/v3/compose.js.html
+++ b/docs/v3/compose.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/concat.js.html b/docs/v3/concat.js.html
index 3f040619b..b12aad8b5 100644
--- a/docs/v3/concat.js.html
+++ b/docs/v3/concat.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/concatLimit.js.html b/docs/v3/concatLimit.js.html
index 07284d135..ab1aab389 100644
--- a/docs/v3/concatLimit.js.html
+++ b/docs/v3/concatLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/concatSeries.js.html b/docs/v3/concatSeries.js.html
index 55ff4455b..7f238b543 100644
--- a/docs/v3/concatSeries.js.html
+++ b/docs/v3/concatSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/constant.js.html b/docs/v3/constant.js.html
index 5f4a30320..f0e3e087b 100644
--- a/docs/v3/constant.js.html
+++ b/docs/v3/constant.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/detect.js.html b/docs/v3/detect.js.html
index 056000ee7..977d6a558 100644
--- a/docs/v3/detect.js.html
+++ b/docs/v3/detect.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/detectLimit.js.html b/docs/v3/detectLimit.js.html
index ebf100b0b..653c16aa0 100644
--- a/docs/v3/detectLimit.js.html
+++ b/docs/v3/detectLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/detectSeries.js.html b/docs/v3/detectSeries.js.html
index 217264821..d6ba392bc 100644
--- a/docs/v3/detectSeries.js.html
+++ b/docs/v3/detectSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/dir.js.html b/docs/v3/dir.js.html
index 81fa71704..17b9392ba 100644
--- a/docs/v3/dir.js.html
+++ b/docs/v3/dir.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/doUntil.js.html b/docs/v3/doUntil.js.html
index 348831d3e..3ba4abdd6 100644
--- a/docs/v3/doUntil.js.html
+++ b/docs/v3/doUntil.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/doWhilst.js.html b/docs/v3/doWhilst.js.html
index 6f94adfdc..f411af473 100644
--- a/docs/v3/doWhilst.js.html
+++ b/docs/v3/doWhilst.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/docs.html b/docs/v3/docs.html
index e4ff9a39a..5afd9b799 100644
--- a/docs/v3/docs.html
+++ b/docs/v3/docs.html
@@ -31,7 +31,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -7391,7 +7391,7 @@ <h5>Parameters:</h5>
             <td class="description last"><p>A function applied to each item in the
 array to produce the next step in the reduction.
 The <code>iteratee</code> should complete with the next state of the reduction.
-If the iteratee complete with an error, the reduction is stopped and the
+If the iteratee completes with an error, the reduction is stopped and the
 main <code>callback</code> is immediately called with the error.
 Invoked with (memo, item, callback).</p></td>
         </tr>
@@ -7717,7 +7717,7 @@ <h5>Parameters:</h5>
             <td class="description last"><p>A function applied to each item in the
 array to produce the next step in the reduction.
 The <code>iteratee</code> should complete with the next state of the reduction.
-If the iteratee complete with an error, the reduction is stopped and the
+If the iteratee completes with an error, the reduction is stopped and the
 main <code>callback</code> is immediately called with the error.
 Invoked with (memo, item, callback).</p></td>
         </tr>
diff --git a/docs/v3/each.js.html b/docs/v3/each.js.html
index a4b7c5b4b..a6402d3f5 100644
--- a/docs/v3/each.js.html
+++ b/docs/v3/each.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/eachLimit.js.html b/docs/v3/eachLimit.js.html
index 1390d3eb8..00390c0f4 100644
--- a/docs/v3/eachLimit.js.html
+++ b/docs/v3/eachLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/eachOf.js.html b/docs/v3/eachOf.js.html
index 132d37bfb..cace15567 100644
--- a/docs/v3/eachOf.js.html
+++ b/docs/v3/eachOf.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/eachOfLimit.js.html b/docs/v3/eachOfLimit.js.html
index 00da9f461..d45a1df9d 100644
--- a/docs/v3/eachOfLimit.js.html
+++ b/docs/v3/eachOfLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/eachOfSeries.js.html b/docs/v3/eachOfSeries.js.html
index 727ec47ae..c9fc3b3c0 100644
--- a/docs/v3/eachOfSeries.js.html
+++ b/docs/v3/eachOfSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/eachSeries.js.html b/docs/v3/eachSeries.js.html
index 3fdeac909..b2ce19111 100644
--- a/docs/v3/eachSeries.js.html
+++ b/docs/v3/eachSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/ensureAsync.js.html b/docs/v3/ensureAsync.js.html
index dbec5dd2e..e3489d160 100644
--- a/docs/v3/ensureAsync.js.html
+++ b/docs/v3/ensureAsync.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/every.js.html b/docs/v3/every.js.html
index 7a01ede1f..30f89a7ba 100644
--- a/docs/v3/every.js.html
+++ b/docs/v3/every.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/everyLimit.js.html b/docs/v3/everyLimit.js.html
index bd7f7482e..b5e2ae654 100644
--- a/docs/v3/everyLimit.js.html
+++ b/docs/v3/everyLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/everySeries.js.html b/docs/v3/everySeries.js.html
index 0e7c02fab..4f56858bc 100644
--- a/docs/v3/everySeries.js.html
+++ b/docs/v3/everySeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/filter.js.html b/docs/v3/filter.js.html
index 9d191c72d..19d0969ee 100644
--- a/docs/v3/filter.js.html
+++ b/docs/v3/filter.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/filterLimit.js.html b/docs/v3/filterLimit.js.html
index fc6fb3ece..aabe578bb 100644
--- a/docs/v3/filterLimit.js.html
+++ b/docs/v3/filterLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/filterSeries.js.html b/docs/v3/filterSeries.js.html
index b76330282..12ca2df51 100644
--- a/docs/v3/filterSeries.js.html
+++ b/docs/v3/filterSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/forever.js.html b/docs/v3/forever.js.html
index 2936a1658..4762adcfe 100644
--- a/docs/v3/forever.js.html
+++ b/docs/v3/forever.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/global.html b/docs/v3/global.html
index 3afe5aaf3..003c55274 100644
--- a/docs/v3/global.html
+++ b/docs/v3/global.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/groupBy.js.html b/docs/v3/groupBy.js.html
index 90f578836..3a0e02976 100644
--- a/docs/v3/groupBy.js.html
+++ b/docs/v3/groupBy.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/groupByLimit.js.html b/docs/v3/groupByLimit.js.html
index 983295923..829b3e43c 100644
--- a/docs/v3/groupByLimit.js.html
+++ b/docs/v3/groupByLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/groupBySeries.js.html b/docs/v3/groupBySeries.js.html
index 65e18f6c0..b139b853f 100644
--- a/docs/v3/groupBySeries.js.html
+++ b/docs/v3/groupBySeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/index.html b/docs/v3/index.html
index a8f67229c..9bc98e1db 100644
--- a/docs/v3/index.html
+++ b/docs/v3/index.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -304,6 +304,7 @@ <h2>Other Libraries</h2>
 <li><a href="https://www.npmjs.com/package/neo-async"><code>neo-async</code></a> an altername implementation of Async, focusing on speed.</li>
 <li><a href="https://www.npmjs.com/package/co-async"><code>co-async</code></a> a library inspired by Async for use with <a href="https://www.npmjs.com/package/co"><code>co</code></a> and generator functions.</li>
 <li><a href="https://www.npmjs.com/package/promise-async"><code>promise-async</code></a> a version of Async where all the methods are Promisified.</li>
+<li><a href="https://www.npmjs.com/package/modern-async">&apos;modern-async&apos;</a> an alternative to Async using only async/await and promises.</li>
 </ul></article>
     </section>
 
diff --git a/docs/v3/index.js.html b/docs/v3/index.js.html
index 73cc75fa8..4a9ceb9f4 100644
--- a/docs/v3/index.js.html
+++ b/docs/v3/index.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/log.js.html b/docs/v3/log.js.html
index 951db8e8f..4e3e40218 100644
--- a/docs/v3/log.js.html
+++ b/docs/v3/log.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/map.js.html b/docs/v3/map.js.html
index b527c06fb..f3104f7b7 100644
--- a/docs/v3/map.js.html
+++ b/docs/v3/map.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/mapLimit.js.html b/docs/v3/mapLimit.js.html
index bb9e6c494..8c340925c 100644
--- a/docs/v3/mapLimit.js.html
+++ b/docs/v3/mapLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/mapSeries.js.html b/docs/v3/mapSeries.js.html
index f339a1324..5cf9fea17 100644
--- a/docs/v3/mapSeries.js.html
+++ b/docs/v3/mapSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/mapValues.js.html b/docs/v3/mapValues.js.html
index d1c6dd0a5..126b27d6b 100644
--- a/docs/v3/mapValues.js.html
+++ b/docs/v3/mapValues.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/mapValuesLimit.js.html b/docs/v3/mapValuesLimit.js.html
index d963a34c5..710b796cf 100644
--- a/docs/v3/mapValuesLimit.js.html
+++ b/docs/v3/mapValuesLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/mapValuesSeries.js.html b/docs/v3/mapValuesSeries.js.html
index 04afec238..7bfb99f6b 100644
--- a/docs/v3/mapValuesSeries.js.html
+++ b/docs/v3/mapValuesSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/memoize.js.html b/docs/v3/memoize.js.html
index 0c7c7faec..861aa3e22 100644
--- a/docs/v3/memoize.js.html
+++ b/docs/v3/memoize.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/module-Collections.html b/docs/v3/module-Collections.html
index 6d21404ce..96f2d3ac8 100644
--- a/docs/v3/module-Collections.html
+++ b/docs/v3/module-Collections.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -7251,7 +7251,7 @@ <h5>Parameters:</h5>
             <td class="description last"><p>A function applied to each item in the
 array to produce the next step in the reduction.
 The <code>iteratee</code> should complete with the next state of the reduction.
-If the iteratee complete with an error, the reduction is stopped and the
+If the iteratee completes with an error, the reduction is stopped and the
 main <code>callback</code> is immediately called with the error.
 Invoked with (memo, item, callback).</p></td>
         </tr>
@@ -7577,7 +7577,7 @@ <h5>Parameters:</h5>
             <td class="description last"><p>A function applied to each item in the
 array to produce the next step in the reduction.
 The <code>iteratee</code> should complete with the next state of the reduction.
-If the iteratee complete with an error, the reduction is stopped and the
+If the iteratee completes with an error, the reduction is stopped and the
 main <code>callback</code> is immediately called with the error.
 Invoked with (memo, item, callback).</p></td>
         </tr>
diff --git a/docs/v3/module-ControlFlow.html b/docs/v3/module-ControlFlow.html
index d48a8a7a9..d891a03c3 100644
--- a/docs/v3/module-ControlFlow.html
+++ b/docs/v3/module-ControlFlow.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/module-Utils.html b/docs/v3/module-Utils.html
index 82ac12cd8..0a8d5169f 100644
--- a/docs/v3/module-Utils.html
+++ b/docs/v3/module-Utils.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/module-async.html b/docs/v3/module-async.html
index 1108e1e2f..b440a882f 100644
--- a/docs/v3/module-async.html
+++ b/docs/v3/module-async.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/nextTick.js.html b/docs/v3/nextTick.js.html
index 4a5ef99d7..0959ef73e 100644
--- a/docs/v3/nextTick.js.html
+++ b/docs/v3/nextTick.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/parallel.js.html b/docs/v3/parallel.js.html
index 40af8d334..420bb0c17 100644
--- a/docs/v3/parallel.js.html
+++ b/docs/v3/parallel.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/parallelLimit.js.html b/docs/v3/parallelLimit.js.html
index 0296bfd45..fb7060fbe 100644
--- a/docs/v3/parallelLimit.js.html
+++ b/docs/v3/parallelLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/priorityQueue.js.html b/docs/v3/priorityQueue.js.html
index eab3c1002..417400d8f 100644
--- a/docs/v3/priorityQueue.js.html
+++ b/docs/v3/priorityQueue.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -105,6 +105,7 @@ <h1 class="page-title">priorityQueue.js</h1>
 export default function(worker, concurrency) {
     // Start with a normal queue
     var q = queue(worker, concurrency);
+    var processingScheduled = false;
 
     q._tasks = new Heap();
 
@@ -132,7 +133,13 @@ <h1 class="page-title">priorityQueue.js</h1>
             q._tasks.push(item);
         }
 
-        setImmediate(q.process);
+        if (!processingScheduled) {
+            processingScheduled = true;
+            setImmediate(() =&gt; {
+                processingScheduled = false;
+                q.process();
+            });
+        }
     };
 
     // Remove unshift function
diff --git a/docs/v3/queue.js.html b/docs/v3/queue.js.html
index d4d00de4f..101e3a216 100644
--- a/docs/v3/queue.js.html
+++ b/docs/v3/queue.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/race.js.html b/docs/v3/race.js.html
index d10439514..fb9032712 100644
--- a/docs/v3/race.js.html
+++ b/docs/v3/race.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/reduce.js.html b/docs/v3/reduce.js.html
index c0c3d9eaa..8a048ce27 100644
--- a/docs/v3/reduce.js.html
+++ b/docs/v3/reduce.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -103,7 +103,7 @@ <h1 class="page-title">reduce.js</h1>
  * @param {AsyncFunction} iteratee - A function applied to each item in the
  * array to produce the next step in the reduction.
  * The `iteratee` should complete with the next state of the reduction.
- * If the iteratee complete with an error, the reduction is stopped and the
+ * If the iteratee completes with an error, the reduction is stopped and the
  * main `callback` is immediately called with the error.
  * Invoked with (memo, item, callback).
  * @param {Function} [callback] - A callback which is called after all the
@@ -208,7 +208,6 @@ <h1 class="page-title">reduce.js</h1>
     }, err =&gt; callback(err, memo));
 }
 export default awaitify(reduce, 4)
-
 </code></pre>
         </article>
     </section>
diff --git a/docs/v3/reduceRight.js.html b/docs/v3/reduceRight.js.html
index 66946c651..4c58ea42b 100644
--- a/docs/v3/reduceRight.js.html
+++ b/docs/v3/reduceRight.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
@@ -92,7 +92,7 @@ <h1 class="page-title">reduceRight.js</h1>
  * @param {AsyncFunction} iteratee - A function applied to each item in the
  * array to produce the next step in the reduction.
  * The `iteratee` should complete with the next state of the reduction.
- * If the iteratee complete with an error, the reduction is stopped and the
+ * If the iteratee completes with an error, the reduction is stopped and the
  * main `callback` is immediately called with the error.
  * Invoked with (memo, item, callback).
  * @param {Function} [callback] - A callback which is called after all the
diff --git a/docs/v3/reflect.js.html b/docs/v3/reflect.js.html
index af0d576e3..0de6f741a 100644
--- a/docs/v3/reflect.js.html
+++ b/docs/v3/reflect.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/reflectAll.js.html b/docs/v3/reflectAll.js.html
index c71a78b39..9acee1401 100644
--- a/docs/v3/reflectAll.js.html
+++ b/docs/v3/reflectAll.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/reject.js.html b/docs/v3/reject.js.html
index 18048d955..b63cc24a0 100644
--- a/docs/v3/reject.js.html
+++ b/docs/v3/reject.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/rejectLimit.js.html b/docs/v3/rejectLimit.js.html
index 7eb86773b..3b1e11aad 100644
--- a/docs/v3/rejectLimit.js.html
+++ b/docs/v3/rejectLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/rejectSeries.js.html b/docs/v3/rejectSeries.js.html
index 759c5a006..a34ddb6da 100644
--- a/docs/v3/rejectSeries.js.html
+++ b/docs/v3/rejectSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/retry.js.html b/docs/v3/retry.js.html
index f65f8f820..0d9e6551f 100644
--- a/docs/v3/retry.js.html
+++ b/docs/v3/retry.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/retryable.js.html b/docs/v3/retryable.js.html
index 8724a7177..5181b537d 100644
--- a/docs/v3/retryable.js.html
+++ b/docs/v3/retryable.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/scripts/async.js b/docs/v3/scripts/async.js
index cafb8c9a8..a5ae1b29e 100644
--- a/docs/v3/scripts/async.js
+++ b/docs/v3/scripts/async.js
@@ -62,6 +62,7 @@
 
     /* istanbul ignore file */
 
+    var hasQueueMicrotask = typeof queueMicrotask === 'function' && queueMicrotask;
     var hasSetImmediate = typeof setImmediate === 'function' && setImmediate;
     var hasNextTick = typeof process === 'object' && typeof process.nextTick === 'function';
 
@@ -75,7 +76,9 @@
 
     var _defer;
 
-    if (hasSetImmediate) {
+    if (hasQueueMicrotask) {
+        _defer = queueMicrotask;
+    } else if (hasSetImmediate) {
         _defer = setImmediate;
     } else if (hasNextTick) {
         _defer = process.nextTick;
@@ -527,12 +530,19 @@
      * @returns {Promise} a promise, if a callback is omitted
      * @example
      *
-     * var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
-     * var configs = {};
+     * // dev.json is a file containing a valid json object config for dev environment
+     * // dev.json is a file containing a valid json object config for test environment
+     * // prod.json is a file containing a valid json object config for prod environment
+     * // invalid.json is a file with a malformed json object
      *
-     * async.forEachOf(obj, function (value, key, callback) {
-     *     fs.readFile(__dirname + value, "utf8", function (err, data) {
-     *         if (err) return callback(err);
+     * let configs = {}; //global variable
+     * let validConfigFileMap = {dev: 'dev.json', test: 'test.json', prod: 'prod.json'};
+     * let invalidConfigFileMap = {dev: 'dev.json', test: 'test.json', invalid: 'invalid.json'};
+     *
+     * // asynchronous function that reads a json file and parses the contents as json object
+     * function parseFile(file, key, callback) {
+     *     fs.readFile(file, "utf8", function(err, data) {
+     *         if (err) return calback(err);
      *         try {
      *             configs[key] = JSON.parse(data);
      *         } catch (e) {
@@ -540,11 +550,73 @@
      *         }
      *         callback();
      *     });
-     * }, function (err) {
-     *     if (err) console.error(err.message);
-     *     // configs is now a map of JSON data
-     *     doSomethingWith(configs);
+     * }
+     *
+     * // Using callbacks
+     * async.forEachOf(validConfigFileMap, parseFile, function (err) {
+     *     if (err) {
+     *         console.error(err);
+     *     } else {
+     *         console.log(configs);
+     *         // configs is now a map of JSON data, e.g.
+     *         // { dev: //parsed dev.json, test: //parsed test.json, prod: //parsed prod.json}
+     *     }
+     * });
+     *
+     * //Error handing
+     * async.forEachOf(invalidConfigFileMap, parseFile, function (err) {
+     *     if (err) {
+     *         console.error(err);
+     *         // JSON parse error exception
+     *     } else {
+     *         console.log(configs);
+     *     }
+     * });
+     *
+     * // Using Promises
+     * async.forEachOf(validConfigFileMap, parseFile)
+     * .then( () => {
+     *     console.log(configs);
+     *     // configs is now a map of JSON data, e.g.
+     *     // { dev: //parsed dev.json, test: //parsed test.json, prod: //parsed prod.json}
+     * }).catch( err => {
+     *     console.error(err);
+     * });
+     *
+     * //Error handing
+     * async.forEachOf(invalidConfigFileMap, parseFile)
+     * .then( () => {
+     *     console.log(configs);
+     * }).catch( err => {
+     *     console.error(err);
+     *     // JSON parse error exception
      * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.forEachOf(validConfigFileMap, parseFile);
+     *         console.log(configs);
+     *         // configs is now a map of JSON data, e.g.
+     *         // { dev: //parsed dev.json, test: //parsed test.json, prod: //parsed prod.json}
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * //Error handing
+     * async () => {
+     *     try {
+     *         let result = await async.forEachOf(invalidConfigFileMap, parseFile);
+     *         console.log(configs);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // JSON parse error exception
+     *     }
+     * }
+     *
      */
     function eachOf(coll, iteratee, callback) {
         var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric;
@@ -586,9 +658,89 @@
      * @returns {Promise} a promise, if no callback is passed
      * @example
      *
-     * async.map(['file1','file2','file3'], fs.stat, function(err, results) {
-     *     // results is now an array of stats for each file
+     * // file1.txt is a file that is 1000 bytes in size
+     * // file2.txt is a file that is 2000 bytes in size
+     * // file3.txt is a file that is 3000 bytes in size
+     * // file4.txt does not exist
+     *
+     * const fileList = ['file1.txt','file2.txt','file3.txt'];
+     * const withMissingFileList = ['file1.txt','file2.txt','file4.txt'];
+     *
+     * // asynchronous function that returns the file size in bytes
+     * function getFileSizeInBytes(file, callback) {
+     *     fs.stat(file, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         callback(null, stat.size);
+     *     });
+     * }
+     *
+     * // Using callbacks
+     * async.map(fileList, getFileSizeInBytes, function(err, results) {
+     *     if (err) {
+     *         console.log(err);
+     *     } else {
+     *         console.log(results);
+     *         // results is now an array of the file size in bytes for each file, e.g.
+     *         // [ 1000, 2000, 3000]
+     *     }
+     * });
+     *
+     * // Error Handling
+     * async.map(withMissingFileList, getFileSizeInBytes, function(err, results) {
+     *     if (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     } else {
+     *         console.log(results);
+     *     }
+     * });
+     *
+     * // Using Promises
+     * async.map(fileList, getFileSizeInBytes)
+     * .then( results => {
+     *     console.log(results);
+     *     // results is now an array of the file size in bytes for each file, e.g.
+     *     // [ 1000, 2000, 3000]
+     * }).catch( err => {
+     *     console.log(err);
      * });
+     *
+     * // Error Handling
+     * async.map(withMissingFileList, getFileSizeInBytes)
+     * .then( results => {
+     *     console.log(results);
+     * }).catch( err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.map(fileList, getFileSizeInBytes);
+     *         console.log(results);
+     *         // results is now an array of the file size in bytes for each file, e.g.
+     *         // [ 1000, 2000, 3000]
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // Error Handling
+     * async () => {
+     *     try {
+     *         let results = await async.map(withMissingFileList, getFileSizeInBytes);
+     *         console.log(results);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     }
+     * }
+     *
      */
     function map (coll, iteratee, callback) {
         return _asyncMap(eachOf$1, coll, iteratee, callback)
@@ -762,15 +914,40 @@
      * @returns {Promise} a promise, if a callback is not passed
      * @example
      *
+     * //Using Callbacks
      * async.auto({
-     *     // this function will just be passed a callback
-     *     readData: async.apply(fs.readFile, 'data.txt', 'utf-8'),
-     *     showData: ['readData', function(results, cb) {
-     *         // results.readData is the file's contents
-     *         // ...
+     *     get_data: function(callback) {
+     *         // async code to get some data
+     *         callback(null, 'data', 'converted to array');
+     *     },
+     *     make_folder: function(callback) {
+     *         // async code to create a directory to store a file in
+     *         // this is run at the same time as getting the data
+     *         callback(null, 'folder');
+     *     },
+     *     write_file: ['get_data', 'make_folder', function(results, callback) {
+     *         // once there is some data and the directory exists,
+     *         // write the data to a file in the directory
+     *         callback(null, 'filename');
+     *     }],
+     *     email_link: ['write_file', function(results, callback) {
+     *         // once the file is written let's email a link to it...
+     *         callback(null, {'file':results.write_file, 'email':'user@example.com'});
      *     }]
-     * }, callback);
+     * }, function(err, results) {
+     *     if (err) {
+     *         console.log('err = ', err);
+     *     }
+     *     console.log('results = ', results);
+     *     // results = {
+     *     //     get_data: ['data', 'converted to array']
+     *     //     make_folder; 'folder',
+     *     //     write_file: 'filename'
+     *     //     email_link: { file: 'filename', email: 'user@example.com' }
+     *     // }
+     * });
      *
+     * //Using Promises
      * async.auto({
      *     get_data: function(callback) {
      *         console.log('in get_data');
@@ -784,21 +961,62 @@
      *         callback(null, 'folder');
      *     },
      *     write_file: ['get_data', 'make_folder', function(results, callback) {
-     *         console.log('in write_file', JSON.stringify(results));
      *         // once there is some data and the directory exists,
      *         // write the data to a file in the directory
      *         callback(null, 'filename');
      *     }],
      *     email_link: ['write_file', function(results, callback) {
-     *         console.log('in email_link', JSON.stringify(results));
      *         // once the file is written let's email a link to it...
-     *         // results.write_file contains the filename returned by write_file.
      *         callback(null, {'file':results.write_file, 'email':'user@example.com'});
      *     }]
-     * }, function(err, results) {
-     *     console.log('err = ', err);
+     * }).then(results => {
      *     console.log('results = ', results);
+     *     // results = {
+     *     //     get_data: ['data', 'converted to array']
+     *     //     make_folder; 'folder',
+     *     //     write_file: 'filename'
+     *     //     email_link: { file: 'filename', email: 'user@example.com' }
+     *     // }
+     * }).catch(err => {
+     *     console.log('err = ', err);
      * });
+     *
+     * //Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.auto({
+     *             get_data: function(callback) {
+     *                 // async code to get some data
+     *                 callback(null, 'data', 'converted to array');
+     *             },
+     *             make_folder: function(callback) {
+     *                 // async code to create a directory to store a file in
+     *                 // this is run at the same time as getting the data
+     *                 callback(null, 'folder');
+     *             },
+     *             write_file: ['get_data', 'make_folder', function(results, callback) {
+     *                 // once there is some data and the directory exists,
+     *                 // write the data to a file in the directory
+     *                 callback(null, 'filename');
+     *             }],
+     *             email_link: ['write_file', function(results, callback) {
+     *                 // once the file is written let's email a link to it...
+     *                 callback(null, {'file':results.write_file, 'email':'user@example.com'});
+     *             }]
+     *         });
+     *         console.log('results = ', results);
+     *         // results = {
+     *         //     get_data: ['data', 'converted to array']
+     *         //     make_folder; 'folder',
+     *         //     write_file: 'filename'
+     *         //     email_link: { file: 'filename', email: 'user@example.com' }
+     *         // }
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function auto(tasks, concurrency, callback) {
         if (typeof concurrency !== 'number') {
@@ -1615,14 +1833,90 @@
      * @returns {Promise} a promise, if no callback is passed
      * @example
      *
-     * async.reduce([1,2,3], 0, function(memo, item, callback) {
-     *     // pointless async:
-     *     process.nextTick(function() {
-     *         callback(null, memo + item)
+     * // file1.txt is a file that is 1000 bytes in size
+     * // file2.txt is a file that is 2000 bytes in size
+     * // file3.txt is a file that is 3000 bytes in size
+     * // file4.txt does not exist
+     *
+     * const fileList = ['file1.txt','file2.txt','file3.txt'];
+     * const withMissingFileList = ['file1.txt','file2.txt','file3.txt', 'file4.txt'];
+     *
+     * // asynchronous function that computes the file size in bytes
+     * // file size is added to the memoized value, then returned
+     * function getFileSizeInBytes(memo, file, callback) {
+     *     fs.stat(file, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         callback(null, memo + stat.size);
      *     });
-     * }, function(err, result) {
-     *     // result is now equal to the last value of memo, which is 6
+     * }
+     *
+     * // Using callbacks
+     * async.reduce(fileList, 0, getFileSizeInBytes, function(err, result) {
+     *     if (err) {
+     *         console.log(err);
+     *     } else {
+     *         console.log(result);
+     *         // 6000
+     *         // which is the sum of the file sizes of the three files
+     *     }
+     * });
+     *
+     * // Error Handling
+     * async.reduce(withMissingFileList, 0, getFileSizeInBytes, function(err, result) {
+     *     if (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     } else {
+     *         console.log(result);
+     *     }
+     * });
+     *
+     * // Using Promises
+     * async.reduce(fileList, 0, getFileSizeInBytes)
+     * .then( result => {
+     *     console.log(result);
+     *     // 6000
+     *     // which is the sum of the file sizes of the three files
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * // Error Handling
+     * async.reduce(withMissingFileList, 0, getFileSizeInBytes)
+     * .then( result => {
+     *     console.log(result);
+     * }).catch( err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
      * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.reduce(fileList, 0, getFileSizeInBytes);
+     *         console.log(result);
+     *         // 6000
+     *         // which is the sum of the file sizes of the three files
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // Error Handling
+     * async () => {
+     *     try {
+     *         let result = await async.reduce(withMissingFileList, 0, getFileSizeInBytes);
+     *         console.log(result);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     }
+     * }
+     *
      */
     function reduce(coll, memo, iteratee, callback) {
         callback = once(callback);
@@ -1826,9 +2120,77 @@
      * @returns A Promise, if no callback is passed
      * @example
      *
-     * async.concat(['dir1','dir2','dir3'], fs.readdir, function(err, files) {
-     *     // files is now a list of filenames that exist in the 3 directories
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     * // dir4 does not exist
+     *
+     * let directoryList = ['dir1','dir2','dir3'];
+     * let withMissingDirectoryList = ['dir1','dir2','dir3', 'dir4'];
+     *
+     * // Using callbacks
+     * async.concat(directoryList, fs.readdir, function(err, results) {
+     *    if (err) {
+     *        console.log(err);
+     *    } else {
+     *        console.log(results);
+     *        // [ 'file1.txt', 'file2.txt', 'file3.txt', 'file4.txt', file5.txt ]
+     *    }
+     * });
+     *
+     * // Error Handling
+     * async.concat(withMissingDirectoryList, fs.readdir, function(err, results) {
+     *    if (err) {
+     *        console.log(err);
+     *        // [ Error: ENOENT: no such file or directory ]
+     *        // since dir4 does not exist
+     *    } else {
+     *        console.log(results);
+     *    }
      * });
+     *
+     * // Using Promises
+     * async.concat(directoryList, fs.readdir)
+     * .then(results => {
+     *     console.log(results);
+     *     // [ 'file1.txt', 'file2.txt', 'file3.txt', 'file4.txt', file5.txt ]
+     * }).catch(err => {
+     *      console.log(err);
+     * });
+     *
+     * // Error Handling
+     * async.concat(withMissingDirectoryList, fs.readdir)
+     * .then(results => {
+     *     console.log(results);
+     * }).catch(err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
+     *     // since dir4 does not exist
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.concat(directoryList, fs.readdir);
+     *         console.log(results);
+     *         // [ 'file1.txt', 'file2.txt', 'file3.txt', 'file4.txt', file5.txt ]
+     *     } catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // Error Handling
+     * async () => {
+     *     try {
+     *         let results = await async.concat(withMissingDirectoryList, fs.readdir);
+     *         console.log(results);
+     *     } catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *         // since dir4 does not exist
+     *     }
+     * }
+     *
      */
     function concat(coll, iteratee, callback) {
         return concatLimit$1(coll, Infinity, iteratee, callback)
@@ -1960,13 +2322,48 @@
      * @returns A Promise, if no callback is passed
      * @example
      *
-     * async.detect(['file1','file2','file3'], function(filePath, callback) {
-     *     fs.access(filePath, function(err) {
-     *         callback(null, !err)
-     *     });
-     * }, function(err, result) {
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     *
+     * // asynchronous function that checks if a file exists
+     * function fileExists(file, callback) {
+     *    fs.access(file, fs.constants.F_OK, (err) => {
+     *        callback(null, !err);
+     *    });
+     * }
+     *
+     * async.detect(['file3.txt','file2.txt','dir1/file1.txt'], fileExists,
+     *    function(err, result) {
+     *        console.log(result);
+     *        // dir1/file1.txt
+     *        // result now equals the first file in the list that exists
+     *    }
+     *);
+     *
+     * // Using Promises
+     * async.detect(['file3.txt','file2.txt','dir1/file1.txt'], fileExists)
+     * .then(result => {
+     *     console.log(result);
+     *     // dir1/file1.txt
      *     // result now equals the first file in the list that exists
+     * }).catch(err => {
+     *     console.log(err);
      * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.detect(['file3.txt','file2.txt','dir1/file1.txt'], fileExists);
+     *         console.log(result);
+     *         // dir1/file1.txt
+     *         // result now equals the file in the list that exists
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function detect(coll, iteratee, callback) {
         return _createTester(bool => bool, (res, item) => item)(eachOf$1, coll, iteratee, callback)
@@ -2030,12 +2427,15 @@
 
     function consoleFunc(name) {
         return (fn, ...args) => wrapAsync(fn)(...args, (err, ...resultArgs) => {
+            /* istanbul ignore else */
             if (typeof console === 'object') {
+                /* istanbul ignore else */
                 if (err) {
+                    /* istanbul ignore else */
                     if (console.error) {
                         console.error(err);
                     }
-                } else if (console[name]) {
+                } else if (console[name]) { /* istanbul ignore else */
                     resultArgs.forEach(x => console[name](x));
                 }
             }
@@ -2180,37 +2580,78 @@
      * @returns {Promise} a promise, if a callback is omitted
      * @example
      *
-     * // assuming openFiles is an array of file names and saveFile is a function
-     * // to save the modified contents of that file:
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     * // dir4 does not exist
      *
-     * async.each(openFiles, saveFile, function(err){
-     *   // if any of the saves produced an error, err would equal that error
-     * });
+     * const fileList = [ 'dir1/file2.txt', 'dir2/file3.txt', 'dir/file5.txt'];
+     * const withMissingFileList = ['dir1/file1.txt', 'dir4/file2.txt'];
      *
-     * // assuming openFiles is an array of file names
-     * async.each(openFiles, function(file, callback) {
-     *
-     *     // Perform operation on file here.
-     *     console.log('Processing file ' + file);
+     * // asynchronous function that deletes a file
+     * const deleteFile = function(file, callback) {
+     *     fs.unlink(file, callback);
+     * };
      *
-     *     if( file.length > 32 ) {
-     *       console.log('This file name is too long');
-     *       callback('File name too long');
-     *     } else {
-     *       // Do work to process file here
-     *       console.log('File processed');
-     *       callback();
-     *     }
-     * }, function(err) {
-     *     // if any of the file processing produced an error, err would equal that error
+     * // Using callbacks
+     * async.each(fileList, deleteFile, function(err) {
      *     if( err ) {
-     *       // One of the iterations produced an error.
-     *       // All processing will now stop.
-     *       console.log('A file failed to process');
+     *         console.log(err);
      *     } else {
-     *       console.log('All files have been processed successfully');
+     *         console.log('All files have been deleted successfully');
      *     }
      * });
+     *
+     * // Error Handling
+     * async.each(withMissingFileList, deleteFile, function(err){
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
+     *     // since dir4/file2.txt does not exist
+     *     // dir1/file1.txt could have been deleted
+     * });
+     *
+     * // Using Promises
+     * async.each(fileList, deleteFile)
+     * .then( () => {
+     *     console.log('All files have been deleted successfully');
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * // Error Handling
+     * async.each(fileList, deleteFile)
+     * .then( () => {
+     *     console.log('All files have been deleted successfully');
+     * }).catch( err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
+     *     // since dir4/file2.txt does not exist
+     *     // dir1/file1.txt could have been deleted
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         await async.each(files, deleteFile);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // Error Handling
+     * async () => {
+     *     try {
+     *         await async.each(withMissingFileList, deleteFile);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *         // since dir4/file2.txt does not exist
+     *         // dir1/file1.txt could have been deleted
+     *     }
+     * }
+     *
      */
     function eachLimit(coll, iteratee, callback) {
         return eachOf$1(coll, _withoutIndex(wrapAsync(iteratee)), callback);
@@ -2345,13 +2786,78 @@
      * @returns {Promise} a promise, if no callback provided
      * @example
      *
-     * async.every(['file1','file2','file3'], function(filePath, callback) {
-     *     fs.access(filePath, function(err) {
-     *         callback(null, !err)
-     *     });
-     * }, function(err, result) {
-     *     // if result is true then every file exists
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     * // dir4 does not exist
+     *
+     * const fileList = ['dir1/file1.txt','dir2/file3.txt','dir3/file5.txt'];
+     * const withMissingFileList = ['file1.txt','file2.txt','file4.txt'];
+     *
+     * // asynchronous function that checks if a file exists
+     * function fileExists(file, callback) {
+     *    fs.access(file, fs.constants.F_OK, (err) => {
+     *        callback(null, !err);
+     *    });
+     * }
+     *
+     * // Using callbacks
+     * async.every(fileList, fileExists, function(err, result) {
+     *     console.log(result);
+     *     // true
+     *     // result is true since every file exists
      * });
+     *
+     * async.every(withMissingFileList, fileExists, function(err, result) {
+     *     console.log(result);
+     *     // false
+     *     // result is false since NOT every file exists
+     * });
+     *
+     * // Using Promises
+     * async.every(fileList, fileExists)
+     * .then( result => {
+     *     console.log(result);
+     *     // true
+     *     // result is true since every file exists
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * async.every(withMissingFileList, fileExists)
+     * .then( result => {
+     *     console.log(result);
+     *     // false
+     *     // result is false since NOT every file exists
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.every(fileList, fileExists);
+     *         console.log(result);
+     *         // true
+     *         // result is true since every file exists
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * async () => {
+     *     try {
+     *         let result = await async.every(withMissingFileList, fileExists);
+     *         console.log(result);
+     *         // false
+     *         // result is false since NOT every file exists
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function every(coll, iteratee, callback) {
         return _createTester(bool => !bool, res => !res)(eachOf$1, coll, iteratee, callback)
@@ -2469,13 +2975,53 @@
      * @returns {Promise} a promise, if no callback provided
      * @example
      *
-     * async.filter(['file1','file2','file3'], function(filePath, callback) {
-     *     fs.access(filePath, function(err) {
-     *         callback(null, !err)
-     *     });
-     * }, function(err, results) {
-     *     // results now equals an array of the existing files
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     *
+     * const files = ['dir1/file1.txt','dir2/file3.txt','dir3/file6.txt'];
+     *
+     * // asynchronous function that checks if a file exists
+     * function fileExists(file, callback) {
+     *    fs.access(file, fs.constants.F_OK, (err) => {
+     *        callback(null, !err);
+     *    });
+     * }
+     *
+     * // Using callbacks
+     * async.filter(files, fileExists, function(err, results) {
+     *    if(err) {
+     *        console.log(err);
+     *    } else {
+     *        console.log(results);
+     *        // [ 'dir1/file1.txt', 'dir2/file3.txt' ]
+     *        // results is now an array of the existing files
+     *    }
      * });
+     *
+     * // Using Promises
+     * async.filter(files, fileExists)
+     * .then(results => {
+     *     console.log(results);
+     *     // [ 'dir1/file1.txt', 'dir2/file3.txt' ]
+     *     // results is now an array of the existing files
+     * }).catch(err => {
+     *     console.log(err);
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.filter(files, fileExists);
+     *         console.log(results);
+     *         // [ 'dir1/file1.txt', 'dir2/file3.txt' ]
+     *         // results is now an array of the existing files
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function filter (coll, iteratee, callback) {
         return _filter(eachOf$1, coll, iteratee, callback)
@@ -2590,7 +3136,7 @@
      * The iteratee should complete with a `key` to group the value under.
      * Invoked with (value, callback).
      * @param {Function} [callback] - A callback which is called when all `iteratee`
-     * functions have finished, or an error occurs. Result is an `Object` whose
+     * functions have finished, or an error occurs. Result is an `Object` whoses
      * properties are arrays of values which returned the corresponding key.
      * @returns {Promise} a promise, if no callback is passed
      */
@@ -2647,20 +3193,74 @@
      * The iteratee should complete with a `key` to group the value under.
      * Invoked with (value, callback).
      * @param {Function} [callback] - A callback which is called when all `iteratee`
-     * functions have finished, or an error occurs. Result is an `Object` whose
+     * functions have finished, or an error occurs. Result is an `Object` whoses
      * properties are arrays of values which returned the corresponding key.
      * @returns {Promise} a promise, if no callback is passed
      * @example
      *
-     * async.groupBy(['userId1', 'userId2', 'userId3'], function(userId, callback) {
-     *     db.findById(userId, function(err, user) {
-     *         if (err) return callback(err);
-     *         return callback(null, user.age);
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     * // dir4 does not exist
+     *
+     * const files = ['dir1/file1.txt','dir2','dir4']
+     *
+     * // asynchronous function that detects file type as none, file, or directory
+     * function detectFile(file, callback) {
+     *     fs.stat(file, function(err, stat) {
+     *         if (err) {
+     *             return callback(null, 'none');
+     *         }
+     *         callback(null, stat.isDirectory() ? 'directory' : 'file');
      *     });
-     * }, function(err, result) {
-     *     // result is object containing the userIds grouped by age
-     *     // e.g. { 30: ['userId1', 'userId3'], 42: ['userId2']};
+     * }
+     *
+     * //Using callbacks
+     * async.groupBy(files, detectFile, function(err, result) {
+     *     if(err) {
+     *         console.log(err);
+     *     } else {
+     *	       console.log(result);
+     *         // {
+     *         //     file: [ 'dir1/file1.txt' ],
+     *         //     none: [ 'dir4' ],
+     *         //     directory: [ 'dir2']
+     *         // }
+     *         // result is object containing the files grouped by type
+     *     }
      * });
+     *
+     * // Using Promises
+     * async.groupBy(files, detectFile)
+     * .then( result => {
+     *     console.log(result);
+     *     // {
+     *     //     file: [ 'dir1/file1.txt' ],
+     *     //     none: [ 'dir4' ],
+     *     //     directory: [ 'dir2']
+     *     // }
+     *     // result is object containing the files grouped by type
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.groupBy(files, detectFile);
+     *         console.log(result);
+     *         // {
+     *         //     file: [ 'dir1/file1.txt' ],
+     *         //     none: [ 'dir4' ],
+     *         //     directory: [ 'dir2']
+     *         // }
+     *         // result is object containing the files grouped by type
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function groupBy (coll, iteratee, callback) {
         return groupByLimit$1(coll, Infinity, iteratee, callback)
@@ -2785,20 +3385,110 @@
      * @returns {Promise} a promise, if no callback is passed
      * @example
      *
-     * async.mapValues({
-     *     f1: 'file1',
-     *     f2: 'file2',
-     *     f3: 'file3'
-     * }, function (file, key, callback) {
-     *   fs.stat(file, callback);
-     * }, function(err, result) {
-     *     // result is now a map of stats for each file, e.g.
+     * // file1.txt is a file that is 1000 bytes in size
+     * // file2.txt is a file that is 2000 bytes in size
+     * // file3.txt is a file that is 3000 bytes in size
+     * // file4.txt does not exist
+     *
+     * const fileMap = {
+     *     f1: 'file1.txt',
+     *     f2: 'file2.txt',
+     *     f3: 'file3.txt'
+     * };
+     *
+     * const withMissingFileMap = {
+     *     f1: 'file1.txt',
+     *     f2: 'file2.txt',
+     *     f3: 'file4.txt'
+     * };
+     *
+     * // asynchronous function that returns the file size in bytes
+     * function getFileSizeInBytes(file, key, callback) {
+     *     fs.stat(file, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         callback(null, stat.size);
+     *     });
+     * }
+     *
+     * // Using callbacks
+     * async.mapValues(fileMap, getFileSizeInBytes, function(err, result) {
+     *     if (err) {
+     *         console.log(err);
+     *     } else {
+     *         console.log(result);
+     *         // result is now a map of file size in bytes for each file, e.g.
+     *         // {
+     *         //     f1: 1000,
+     *         //     f2: 2000,
+     *         //     f3: 3000
+     *         // }
+     *     }
+     * });
+     *
+     * // Error handling
+     * async.mapValues(withMissingFileMap, getFileSizeInBytes, function(err, result) {
+     *     if (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     } else {
+     *         console.log(result);
+     *     }
+     * });
+     *
+     * // Using Promises
+     * async.mapValues(fileMap, getFileSizeInBytes)
+     * .then( result => {
+     *     console.log(result);
+     *     // result is now a map of file size in bytes for each file, e.g.
      *     // {
-     *     //     f1: [stats for file1],
-     *     //     f2: [stats for file2],
-     *     //     f3: [stats for file3]
+     *     //     f1: 1000,
+     *     //     f2: 2000,
+     *     //     f3: 3000
      *     // }
+     * }).catch (err => {
+     *     console.log(err);
      * });
+     *
+     * // Error Handling
+     * async.mapValues(withMissingFileMap, getFileSizeInBytes)
+     * .then( result => {
+     *     console.log(result);
+     * }).catch (err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.mapValues(fileMap, getFileSizeInBytes);
+     *         console.log(result);
+     *         // result is now a map of file size in bytes for each file, e.g.
+     *         // {
+     *         //     f1: 1000,
+     *         //     f2: 2000,
+     *         //     f3: 3000
+     *         // }
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // Error Handling
+     * async () => {
+     *     try {
+     *         let result = await async.mapValues(withMissingFileMap, getFileSizeInBytes);
+     *         console.log(result);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     }
+     * }
+     *
      */
     function mapValues(obj, iteratee, callback) {
         return mapValuesLimit$1(obj, Infinity, iteratee, callback)
@@ -2941,7 +3631,7 @@
 
     var nextTick = wrap(_defer$1);
 
-    var parallel = awaitify((eachfn, tasks, callback) => {
+    var _parallel = awaitify((eachfn, tasks, callback) => {
         var results = isArrayLike(tasks) ? [] : {};
 
         eachfn(tasks, (task, key, taskCb) => {
@@ -2991,6 +3681,8 @@
      * @returns {Promise} a promise, if a callback is not passed
      *
      * @example
+     *
+     * //Using Callbacks
      * async.parallel([
      *     function(callback) {
      *         setTimeout(function() {
@@ -3002,10 +3694,9 @@
      *             callback(null, 'two');
      *         }, 100);
      *     }
-     * ],
-     * // optional callback
-     * function(err, results) {
-     *     // the results array will equal ['one','two'] even though
+     * ], function(err, results) {
+     *     console.log(results);
+     *     // results is equal to ['one','two'] even though
      *     // the second function had a shorter timeout.
      * });
      *
@@ -3022,11 +3713,99 @@
      *         }, 100);
      *     }
      * }, function(err, results) {
-     *     // results is now equals to: {one: 1, two: 2}
+     *     console.log(results);
+     *     // results is equal to: { one: 1, two: 2 }
+     * });
+     *
+     * //Using Promises
+     * async.parallel([
+     *     function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 'one');
+     *         }, 200);
+     *     },
+     *     function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 'two');
+     *         }, 100);
+     *     }
+     * ]).then(results => {
+     *     console.log(results);
+     *     // results is equal to ['one','two'] even though
+     *     // the second function had a shorter timeout.
+     * }).catch(err => {
+     *     console.log(err);
+     * });
+     *
+     * // an example using an object instead of an array
+     * async.parallel({
+     *     one: function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 1);
+     *         }, 200);
+     *     },
+     *     two: function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 2);
+     *         }, 100);
+     *     }
+     * }).then(results => {
+     *     console.log(results);
+     *     // results is equal to: { one: 1, two: 2 }
+     * }).catch(err => {
+     *     console.log(err);
      * });
+     *
+     * //Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.parallel([
+     *             function(callback) {
+     *                 setTimeout(function() {
+     *                     callback(null, 'one');
+     *                 }, 200);
+     *             },
+     *             function(callback) {
+     *                 setTimeout(function() {
+     *                     callback(null, 'two');
+     *                 }, 100);
+     *             }
+     *         ]);
+     *         console.log(results);
+     *         // results is equal to ['one','two'] even though
+     *         // the second function had a shorter timeout.
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // an example using an object instead of an array
+     * async () => {
+     *     try {
+     *         let results = await async.parallel({
+     *             one: function(callback) {
+     *                 setTimeout(function() {
+     *                     callback(null, 1);
+     *                 }, 200);
+     *             },
+     *            two: function(callback) {
+     *                 setTimeout(function() {
+     *                     callback(null, 2);
+     *                 }, 100);
+     *            }
+     *         });
+     *         console.log(results);
+     *         // results is equal to: { one: 1, two: 2 }
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
-    function parallel$1(tasks, callback) {
-        return parallel(eachOf$1, tasks, callback);
+    function parallel(tasks, callback) {
+        return _parallel(eachOf$1, tasks, callback);
     }
 
     /**
@@ -3050,7 +3829,7 @@
      * @returns {Promise} a promise, if a callback is not passed
      */
     function parallelLimit(tasks, limit, callback) {
-        return parallel(eachOfLimit(limit), tasks, callback);
+        return _parallel(eachOfLimit(limit), tasks, callback);
     }
 
     /**
@@ -3343,6 +4122,7 @@
     function priorityQueue(worker, concurrency) {
         // Start with a normal queue
         var q = queue$1(worker, concurrency);
+        var processingScheduled = false;
 
         q._tasks = new Heap();
 
@@ -3370,7 +4150,13 @@
                 q._tasks.push(item);
             }
 
-            setImmediate$1(q.process);
+            if (!processingScheduled) {
+                processingScheduled = true;
+                setImmediate$1(() => {
+                    processingScheduled = false;
+                    q.process();
+                });
+            }
         };
 
         // Remove unshift function
@@ -3623,14 +4409,48 @@
      * @returns {Promise} a promise, if no callback is passed
      * @example
      *
-     * async.reject(['file1','file2','file3'], function(filePath, callback) {
-     *     fs.access(filePath, function(err) {
-     *         callback(null, !err)
-     *     });
-     * }, function(err, results) {
-     *     // results now equals an array of missing files
-     *     createFiles(results);
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     *
+     * const fileList = ['dir1/file1.txt','dir2/file3.txt','dir3/file6.txt'];
+     *
+     * // asynchronous function that checks if a file exists
+     * function fileExists(file, callback) {
+     *    fs.access(file, fs.constants.F_OK, (err) => {
+     *        callback(null, !err);
+     *    });
+     * }
+     *
+     * // Using callbacks
+     * async.reject(fileList, fileExists, function(err, results) {
+     *    // [ 'dir3/file6.txt' ]
+     *    // results now equals an array of the non-existing files
+     * });
+     *
+     * // Using Promises
+     * async.reject(fileList, fileExists)
+     * .then( results => {
+     *     console.log(results);
+     *     // [ 'dir3/file6.txt' ]
+     *     // results now equals an array of the non-existing files
+     * }).catch( err => {
+     *     console.log(err);
      * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.reject(fileList, fileExists);
+     *         console.log(results);
+     *         // [ 'dir3/file6.txt' ]
+     *         // results now equals an array of the non-existing files
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function reject$1 (coll, iteratee, callback) {
         return reject(eachOf$1, coll, iteratee, callback)
@@ -3923,38 +4743,138 @@
      * with (err, result).
      * @return {Promise} a promise, if no callback is passed
      * @example
+     *
+     * //Using Callbacks
      * async.series([
      *     function(callback) {
-     *         // do some stuff ...
-     *         callback(null, 'one');
+     *         setTimeout(function() {
+     *             // do some async task
+     *             callback(null, 'one');
+     *         }, 200);
      *     },
      *     function(callback) {
-     *         // do some more stuff ...
-     *         callback(null, 'two');
+     *         setTimeout(function() {
+     *             // then do another async task
+     *             callback(null, 'two');
+     *         }, 100);
      *     }
-     * ],
-     * // optional callback
-     * function(err, results) {
-     *     // results is now equal to ['one', 'two']
+     * ], function(err, results) {
+     *     console.log(results);
+     *     // results is equal to ['one','two']
      * });
      *
+     * // an example using objects instead of arrays
      * async.series({
      *     one: function(callback) {
      *         setTimeout(function() {
+     *             // do some async task
      *             callback(null, 1);
      *         }, 200);
      *     },
-     *     two: function(callback){
+     *     two: function(callback) {
      *         setTimeout(function() {
+     *             // then do another async task
      *             callback(null, 2);
      *         }, 100);
      *     }
      * }, function(err, results) {
-     *     // results is now equal to: {one: 1, two: 2}
+     *     console.log(results);
+     *     // results is equal to: { one: 1, two: 2 }
+     * });
+     *
+     * //Using Promises
+     * async.series([
+     *     function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 'one');
+     *         }, 200);
+     *     },
+     *     function(callback) {
+     *         setTimeout(function() {
+     *             callback(null, 'two');
+     *         }, 100);
+     *     }
+     * ]).then(results => {
+     *     console.log(results);
+     *     // results is equal to ['one','two']
+     * }).catch(err => {
+     *     console.log(err);
+     * });
+     *
+     * // an example using an object instead of an array
+     * async.series({
+     *     one: function(callback) {
+     *         setTimeout(function() {
+     *             // do some async task
+     *             callback(null, 1);
+     *         }, 200);
+     *     },
+     *     two: function(callback) {
+     *         setTimeout(function() {
+     *             // then do another async task
+     *             callback(null, 2);
+     *         }, 100);
+     *     }
+     * }).then(results => {
+     *     console.log(results);
+     *     // results is equal to: { one: 1, two: 2 }
+     * }).catch(err => {
+     *     console.log(err);
      * });
+     *
+     * //Using async/await
+     * async () => {
+     *     try {
+     *         let results = await async.series([
+     *             function(callback) {
+     *                 setTimeout(function() {
+     *                     // do some async task
+     *                     callback(null, 'one');
+     *                 }, 200);
+     *             },
+     *             function(callback) {
+     *                 setTimeout(function() {
+     *                     // then do another async task
+     *                     callback(null, 'two');
+     *                 }, 100);
+     *             }
+     *         ]);
+     *         console.log(results);
+     *         // results is equal to ['one','two']
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * // an example using an object instead of an array
+     * async () => {
+     *     try {
+     *         let results = await async.parallel({
+     *             one: function(callback) {
+     *                 setTimeout(function() {
+     *                     // do some async task
+     *                     callback(null, 1);
+     *                 }, 200);
+     *             },
+     *            two: function(callback) {
+     *                 setTimeout(function() {
+     *                     // then do another async task
+     *                     callback(null, 2);
+     *                 }, 100);
+     *            }
+     *         });
+     *         console.log(results);
+     *         // results is equal to: { one: 1, two: 2 }
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function series(tasks, callback) {
-        return parallel(eachOfSeries$1, tasks, callback);
+        return _parallel(eachOfSeries$1, tasks, callback);
     }
 
     /**
@@ -3980,13 +4900,79 @@
      * @returns {Promise} a promise, if no callback provided
      * @example
      *
-     * async.some(['file1','file2','file3'], function(filePath, callback) {
-     *     fs.access(filePath, function(err) {
-     *         callback(null, !err)
-     *     });
-     * }, function(err, result) {
-     *     // if result is true then at least one of the files exists
+     * // dir1 is a directory that contains file1.txt, file2.txt
+     * // dir2 is a directory that contains file3.txt, file4.txt
+     * // dir3 is a directory that contains file5.txt
+     * // dir4 does not exist
+     *
+     * // asynchronous function that checks if a file exists
+     * function fileExists(file, callback) {
+     *    fs.access(file, fs.constants.F_OK, (err) => {
+     *        callback(null, !err);
+     *    });
+     * }
+     *
+     * // Using callbacks
+     * async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists,
+     *    function(err, result) {
+     *        console.log(result);
+     *        // true
+     *        // result is true since some file in the list exists
+     *    }
+     *);
+     *
+     * async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists,
+     *    function(err, result) {
+     *        console.log(result);
+     *        // false
+     *        // result is false since none of the files exists
+     *    }
+     *);
+     *
+     * // Using Promises
+     * async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists)
+     * .then( result => {
+     *     console.log(result);
+     *     // true
+     *     // result is true since some file in the list exists
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists)
+     * .then( result => {
+     *     console.log(result);
+     *     // false
+     *     // result is false since none of the files exists
+     * }).catch( err => {
+     *     console.log(err);
      * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists);
+     *         console.log(result);
+     *         // true
+     *         // result is true since some file in the list exists
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
+     * async () => {
+     *     try {
+     *         let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists);
+     *         console.log(result);
+     *         // false
+     *         // result is false since none of the files exists
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function some(coll, iteratee, callback) {
         return _createTester(Boolean, res => res)(eachOf$1, coll, iteratee, callback)
@@ -4068,31 +5054,133 @@
      * @returns {Promise} a promise, if no callback passed
      * @example
      *
-     * async.sortBy(['file1','file2','file3'], function(file, callback) {
-     *     fs.stat(file, function(err, stats) {
-     *         callback(err, stats.mtime);
+     * // bigfile.txt is a file that is 251100 bytes in size
+     * // mediumfile.txt is a file that is 11000 bytes in size
+     * // smallfile.txt is a file that is 121 bytes in size
+     *
+     * // asynchronous function that returns the file size in bytes
+     * function getFileSizeInBytes(file, callback) {
+     *     fs.stat(file, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         callback(null, stat.size);
      *     });
-     * }, function(err, results) {
-     *     // results is now the original array of files sorted by
-     *     // modified date
-     * });
+     * }
+     *
+     * // Using callbacks
+     * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], getFileSizeInBytes,
+     *     function(err, results) {
+     *         if (err) {
+     *             console.log(err);
+     *         } else {
+     *             console.log(results);
+     *             // results is now the original array of files sorted by
+     *             // file size (ascending by default), e.g.
+     *             // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+     *         }
+     *     }
+     * );
      *
      * // By modifying the callback parameter the
      * // sorting order can be influenced:
      *
      * // ascending order
-     * async.sortBy([1,9,3,5], function(x, callback) {
-     *     callback(null, x);
-     * }, function(err,result) {
-     *     // result callback
-     * });
+     * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], function(file, callback) {
+     *     getFileSizeInBytes(file, function(getFileSizeErr, fileSize) {
+     *         if (getFileSizeErr) return callback(getFileSizeErr);
+     *         callback(null, fileSize);
+     *     });
+     * }, function(err, results) {
+     *         if (err) {
+     *             console.log(err);
+     *         } else {
+     *             console.log(results);
+     *             // results is now the original array of files sorted by
+     *             // file size (ascending by default), e.g.
+     *             // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+     *         }
+     *     }
+     * );
      *
      * // descending order
-     * async.sortBy([1,9,3,5], function(x, callback) {
-     *     callback(null, x*-1);    //<- x*-1 instead of x, turns the order around
-     * }, function(err,result) {
-     *     // result callback
+     * async.sortBy(['bigfile.txt','mediumfile.txt','smallfile.txt'], function(file, callback) {
+     *     getFileSizeInBytes(file, function(getFileSizeErr, fileSize) {
+     *         if (getFileSizeErr) {
+     *             return callback(getFileSizeErr);
+     *         }
+     *         callback(null, fileSize * -1);
+     *     });
+     * }, function(err, results) {
+     *         if (err) {
+     *             console.log(err);
+     *         } else {
+     *             console.log(results);
+     *             // results is now the original array of files sorted by
+     *             // file size (ascending by default), e.g.
+     *             // [ 'bigfile.txt', 'mediumfile.txt', 'smallfile.txt']
+     *         }
+     *     }
+     * );
+     *
+     * // Error handling
+     * async.sortBy(['mediumfile.txt','smallfile.txt','missingfile.txt'], getFileSizeInBytes,
+     *     function(err, results) {
+     *         if (err) {
+     *             console.log(err);
+     *             // [ Error: ENOENT: no such file or directory ]
+     *         } else {
+     *             console.log(results);
+     *         }
+     *     }
+     * );
+     *
+     * // Using Promises
+     * async.sortBy(['mediumfile.txt','smallfile.txt','bigfile.txt'], getFileSizeInBytes)
+     * .then( results => {
+     *     console.log(results);
+     *     // results is now the original array of files sorted by
+     *     // file size (ascending by default), e.g.
+     *     // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+     * }).catch( err => {
+     *     console.log(err);
+     * });
+     *
+     * // Error handling
+     * async.sortBy(['mediumfile.txt','smallfile.txt','missingfile.txt'], getFileSizeInBytes)
+     * .then( results => {
+     *     console.log(results);
+     * }).catch( err => {
+     *     console.log(err);
+     *     // [ Error: ENOENT: no such file or directory ]
      * });
+     *
+     * // Using async/await
+     * (async () => {
+     *     try {
+     *         let results = await async.sortBy(['bigfile.txt','mediumfile.txt','smallfile.txt'], getFileSizeInBytes);
+     *         console.log(results);
+     *         // results is now the original array of files sorted by
+     *         // file size (ascending by default), e.g.
+     *         // [ 'smallfile.txt', 'mediumfile.txt', 'bigfile.txt']
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * })();
+     *
+     * // Error handling
+     * async () => {
+     *     try {
+     *         let results = await async.sortBy(['missingfile.txt','mediumfile.txt','smallfile.txt'], getFileSizeInBytes);
+     *         console.log(results);
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *         // [ Error: ENOENT: no such file or directory ]
+     *     }
+     * }
+     *
      */
     function sortBy (coll, iteratee, callback) {
         var _iteratee = wrapAsync(iteratee);
@@ -4293,26 +5381,118 @@
      * @returns {Promise} a promise, if no callback provided
      * @example
      *
-     * async.transform([1,2,3], function(acc, item, index, callback) {
-     *     // pointless async:
-     *     process.nextTick(function() {
-     *         acc[index] = item * 2
-     *         callback(null)
+     * // file1.txt is a file that is 1000 bytes in size
+     * // file2.txt is a file that is 2000 bytes in size
+     * // file3.txt is a file that is 3000 bytes in size
+     *
+     * // helper function that returns human-readable size format from bytes
+     * function formatBytes(bytes, decimals = 2) {
+     *   // implementation not included for brevity
+     *   return humanReadbleFilesize;
+     * }
+     *
+     * const fileList = ['file1.txt','file2.txt','file3.txt'];
+     *
+     * // asynchronous function that returns the file size, transformed to human-readable format
+     * // e.g. 1024 bytes = 1KB, 1234 bytes = 1.21 KB, 1048576 bytes = 1MB, etc.
+     * function transformFileSize(acc, value, key, callback) {
+     *     fs.stat(value, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         acc[key] = formatBytes(stat.size);
+     *         callback(null);
      *     });
-     * }, function(err, result) {
-     *     // result is now equal to [2, 4, 6]
+     * }
+     *
+     * // Using callbacks
+     * async.transform(fileList, transformFileSize, function(err, result) {
+     *     if(err) {
+     *         console.log(err);
+     *     } else {
+     *         console.log(result);
+     *         // [ '1000 Bytes', '1.95 KB', '2.93 KB' ]
+     *     }
      * });
      *
+     * // Using Promises
+     * async.transform(fileList, transformFileSize)
+     * .then(result => {
+     *     console.log(result);
+     *     // [ '1000 Bytes', '1.95 KB', '2.93 KB' ]
+     * }).catch(err => {
+     *     console.log(err);
+     * });
+     *
+     * // Using async/await
+     * (async () => {
+     *     try {
+     *         let result = await async.transform(fileList, transformFileSize);
+     *         console.log(result);
+     *         // [ '1000 Bytes', '1.95 KB', '2.93 KB' ]
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * })();
+     *
      * @example
      *
-     * async.transform({a: 1, b: 2, c: 3}, function (obj, val, key, callback) {
-     *     setImmediate(function () {
-     *         obj[key] = val * 2;
-     *         callback();
-     *     })
-     * }, function (err, result) {
-     *     // result is equal to {a: 2, b: 4, c: 6}
-     * })
+     * // file1.txt is a file that is 1000 bytes in size
+     * // file2.txt is a file that is 2000 bytes in size
+     * // file3.txt is a file that is 3000 bytes in size
+     *
+     * // helper function that returns human-readable size format from bytes
+     * function formatBytes(bytes, decimals = 2) {
+     *   // implementation not included for brevity
+     *   return humanReadbleFilesize;
+     * }
+     *
+     * const fileMap = { f1: 'file1.txt', f2: 'file2.txt', f3: 'file3.txt' };
+     *
+     * // asynchronous function that returns the file size, transformed to human-readable format
+     * // e.g. 1024 bytes = 1KB, 1234 bytes = 1.21 KB, 1048576 bytes = 1MB, etc.
+     * function transformFileSize(acc, value, key, callback) {
+     *     fs.stat(value, function(err, stat) {
+     *         if (err) {
+     *             return callback(err);
+     *         }
+     *         acc[key] = formatBytes(stat.size);
+     *         callback(null);
+     *     });
+     * }
+     *
+     * // Using callbacks
+     * async.transform(fileMap, transformFileSize, function(err, result) {
+     *     if(err) {
+     *         console.log(err);
+     *     } else {
+     *         console.log(result);
+     *         // { f1: '1000 Bytes', f2: '1.95 KB', f3: '2.93 KB' }
+     *     }
+     * });
+     *
+     * // Using Promises
+     * async.transform(fileMap, transformFileSize)
+     * .then(result => {
+     *     console.log(result);
+     *     // { f1: '1000 Bytes', f2: '1.95 KB', f3: '2.93 KB' }
+     * }).catch(err => {
+     *     console.log(err);
+     * });
+     *
+     * // Using async/await
+     * async () => {
+     *     try {
+     *         let result = await async.transform(fileMap, transformFileSize);
+     *         console.log(result);
+     *         // { f1: '1000 Bytes', f2: '1.95 KB', f3: '2.93 KB' }
+     *     }
+     *     catch (err) {
+     *         console.log(err);
+     *     }
+     * }
+     *
      */
     function transform (coll, accumulator, iteratee, callback) {
         if (arguments.length <= 3 && typeof accumulator === 'function') {
@@ -4490,7 +5670,7 @@
      * @example
      * const results = []
      * let finished = false
-     * async.until(function test(page, cb) {
+     * async.until(function test(cb) {
      *     cb(null, finished)
      * }, function iter(next) {
      *     fetchPage(url, (err, body) => {
@@ -4674,7 +5854,7 @@
         mapValuesSeries,
         memoize,
         nextTick,
-        parallel: parallel$1,
+        parallel,
         parallelLimit,
         priorityQueue,
         queue: queue$1,
@@ -4782,7 +5962,7 @@
     exports.mapValuesSeries = mapValuesSeries;
     exports.memoize = memoize;
     exports.nextTick = nextTick;
-    exports.parallel = parallel$1;
+    exports.parallel = parallel;
     exports.parallelLimit = parallelLimit;
     exports.priorityQueue = priorityQueue;
     exports.queue = queue$1;
diff --git a/docs/v3/seq.js.html b/docs/v3/seq.js.html
index 2a47ead41..ca0cbb1a9 100644
--- a/docs/v3/seq.js.html
+++ b/docs/v3/seq.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/series.js.html b/docs/v3/series.js.html
index bef4a61e7..0148c3e1e 100644
--- a/docs/v3/series.js.html
+++ b/docs/v3/series.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/setImmediate.js.html b/docs/v3/setImmediate.js.html
index b13f4744e..d22ef381b 100644
--- a/docs/v3/setImmediate.js.html
+++ b/docs/v3/setImmediate.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/some.js.html b/docs/v3/some.js.html
index 4d89facb6..ee4ff8126 100644
--- a/docs/v3/some.js.html
+++ b/docs/v3/some.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/someLimit.js.html b/docs/v3/someLimit.js.html
index 4ad128a84..7f187a6b9 100644
--- a/docs/v3/someLimit.js.html
+++ b/docs/v3/someLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/someSeries.js.html b/docs/v3/someSeries.js.html
index 30a91683f..f8ac517f1 100644
--- a/docs/v3/someSeries.js.html
+++ b/docs/v3/someSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/sortBy.js.html b/docs/v3/sortBy.js.html
index 7bd91eda8..04323f9a2 100644
--- a/docs/v3/sortBy.js.html
+++ b/docs/v3/sortBy.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/timeout.js.html b/docs/v3/timeout.js.html
index 017cee8de..45fcc7e31 100644
--- a/docs/v3/timeout.js.html
+++ b/docs/v3/timeout.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/times.js.html b/docs/v3/times.js.html
index 6202a24f9..88fa623b9 100644
--- a/docs/v3/times.js.html
+++ b/docs/v3/times.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/timesLimit.js.html b/docs/v3/timesLimit.js.html
index 18d946f42..58ad633a9 100644
--- a/docs/v3/timesLimit.js.html
+++ b/docs/v3/timesLimit.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/timesSeries.js.html b/docs/v3/timesSeries.js.html
index 5b062dccc..a9bae07a4 100644
--- a/docs/v3/timesSeries.js.html
+++ b/docs/v3/timesSeries.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/transform.js.html b/docs/v3/transform.js.html
index cb5324abf..c9b34efa1 100644
--- a/docs/v3/transform.js.html
+++ b/docs/v3/transform.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/tryEach.js.html b/docs/v3/tryEach.js.html
index c69c78431..e42122dff 100644
--- a/docs/v3/tryEach.js.html
+++ b/docs/v3/tryEach.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/unmemoize.js.html b/docs/v3/unmemoize.js.html
index f30ae0178..a36f6555b 100644
--- a/docs/v3/unmemoize.js.html
+++ b/docs/v3/unmemoize.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/until.js.html b/docs/v3/until.js.html
index 5cb8c52b1..646a663c9 100644
--- a/docs/v3/until.js.html
+++ b/docs/v3/until.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/waterfall.js.html b/docs/v3/waterfall.js.html
index eb6c74a22..8b80db546 100644
--- a/docs/v3/waterfall.js.html
+++ b/docs/v3/waterfall.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>
diff --git a/docs/v3/whilst.js.html b/docs/v3/whilst.js.html
index d81c0bddb..b957f5367 100644
--- a/docs/v3/whilst.js.html
+++ b/docs/v3/whilst.js.html
@@ -30,7 +30,7 @@
   </div>
   <ul class="nav navbar-nav">
     <li id="version-dropdown" class="dropdown">
-      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.0 <span class="caret"></span>
+      <a href="#" class="dropdown-toggle vertically-centered" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">v3.2.1 <span class="caret"></span>
       </a>
       <ul class="dropdown-menu">
         <li><a href="../v3/">v3.0.x</a></li>