[skip ci] v2.3.1

Author: Travis CI User

package.json

@@ -15,7 +15,7 @@
     "es6",
     "es7"
   ],
-  "version": "2.3.1-next.8",
+  "version": "2.3.1",
   "author": {
     "name": "Daniel Schaffer",
     "email": "[email protected]",