Update Yarn to the latest version (closes date-fns#883) (date-fns#1191)

* Update Yarn to the latest version
* Fix find warning
* Fix yarn warning about passing args with --

.travis.yml

@@ -17,6 +17,7 @@ before_install:
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
+  - npm install -g yarn
 
 branches:
   only:

package.json

@@ -18,7 +18,7 @@
   "scripts": {
     "test": "karma start config/karma.js",
     "lint": "echo \"Due to ongoing migration to Prettier, the linter is disabled.\"",
-    "benchmark": "env TEST_BENCHMARK=true yarn test -- --single-run",
+    "benchmark": "env TEST_BENCHMARK=true yarn test --single-run",
     "stats": "cloc . --exclude-dir=node_modules,tmp,.git",
     "postinstall": "node ./docs/printV2Notice.js"
   },

scripts/build/package.sh

@@ -28,7 +28,7 @@ babel src --source-root src --out-dir "$dir" --ignore test.js,benchmark.js --cop
 # Copy ES (a.k.a. ES6, ES2016, ES2017, etc.) files
 
 # Copy the source code
-for fnDir in $(find src -type d -maxdepth 1 -mindepth 1 | sed 's/src\///' | sed 's/\///')
+for fnDir in $(find src -maxdepth 1 -mindepth 1 -type d | sed 's/src\///' | sed 's/\///')
 do
   if [ "$fnDir" == "esm" ]
   then

scripts/test/travis.sh

@@ -19,7 +19,7 @@ then
   ./scripts/test/systemJS.js
   ./scripts/test/smoke.sh
 
-  yarn test -- --single-run
+  yarn test --single-run
 
   ./scripts/test/dst.sh
 
@@ -34,7 +34,7 @@ then
 elif [ "$TEST_SUITE" == "cross_browser" ] && [ "$SAUCE_USERNAME" != "" ]
 then
   yarn test-cross-browser
-  env TEST_CROSS_BROWSER=true yarn test -- --single-run
+  env TEST_CROSS_BROWSER=true yarn test --single-run
 
 else
   printf "\n\033[0;31m" "UNKNOWN SUITE!" "\033[0m\n"

scripts/test/tz.sh

@@ -15,6 +15,6 @@ for tz in UTC-12:00 UTC-11:00 UTC-10:00 UTC-09:30 UTC-09:00 \
   UTC+11:30 UTC+12:00 UTC+12:45 UTC+13:00 UTC+14:00
 do
   printf "Run test in time zone $tz\n"
-  env TEST_TZ=true USE_STATIC_TESTS=true TZ=$tz yarn test -- --single-run \
+  env TEST_TZ=true USE_STATIC_TESTS=true TZ=$tz yarn test --single-run \
     &>tmp/last_test_output.txt || (cat tmp/last_test_output.txt && exit 1) || exit 1
 done

scripts/test/tzExtended.sh

@@ -363,6 +363,6 @@ fi
 for tz in "${tz_array[@]}"
 do
   printf "Run test in time zone $tz\n"
-  env TEST_TZ=true USE_STATIC_TESTS=true TZ=$tz yarn test -- --single-run \
+  env TEST_TZ=true USE_STATIC_TESTS=true TZ=$tz yarn test --single-run \
     &>tmp/last_test_output.txt || (cat tmp/last_test_output.txt && exit 1) || exit 1
 done