Add array-callback-return

Author: beschoenen

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mapcreator/eslint-config",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "MapCreator eslint configs",
   "main": "index.js",
   "repository": "git@github.com:MapCreatorEU/eslint-config.git",

rules/es6/bestPractices.js

@@ -2,6 +2,7 @@ const prod = require('../../helpers/prod');
 
 module.exports = {
   rules: {
+    'array-callback-return': 'error',
     'block-scoped-var': 'error',
     'curly': ['error', 'multi-line', 'consistent'],
     // 'default-case': [],