Patternslib es6 is now merged.

Author: thet

package.json

@@ -15,7 +15,7 @@
   },
   "main": "./src/pat-content-mirror.js",
   "dependencies": {
-    "patternslib": "https://github.com/Patternslib/Patterns#es6"
+    "patternslib": "https://github.com/Patternslib/Patterns#master"
   },
   "devDependencies": {
     "@babel/preset-env": "^7.9.6",