From 98a048911015ed06ca34832aab0a5325114c0db7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrzej=20K=C5=82apec=CC=81?= <andrzej.klapec@gmail.com>
Date: Sun, 4 Oct 2020 21:17:46 +0200
Subject: [PATCH] Use Object.keys as Object.values is not supported in node<7

Object.values was introduced in 138b1019f1fb2d58c0ee8a1f8f92c31573f36953
and it is not supported in node.js until version 7, so it's a mismatch
with what's declared in the `engines` section of package.json (node >= 6).
---
 src/stringify.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/stringify.ts b/src/stringify.ts
index 68694421..b60b8cfe 100644
--- a/src/stringify.ts
+++ b/src/stringify.ts
@@ -11,7 +11,9 @@ const actionTypes: { [key: string]: string } = {
 };
 
 const charsToEscape = new Set([
-    ...Object.values(actionTypes).filter(Boolean),
+    ...Object.keys(actionTypes)
+        .map((typeKey) => actionTypes[typeKey])
+        .filter(Boolean),
     ":",
     "[",
     "]",