Enforces return statements in callbacks of array's methods (array-callback-return)

Fixes: standard/standard#859

Author: feross

eslintrc.json

@@ -28,6 +28,10 @@
   "rules": {
     "accessor-pairs": "error",
     "array-bracket-spacing": ["error", "never"],
+    "array-callback-return": ["error", {
+      "allowImplicit": false,
+      "checkForEach": false
+    }],
     "arrow-spacing": ["error", { "before": true, "after": true }],
     "block-spacing": ["error", "always"],
     "brace-style": ["error", "1tbs", { "allowSingleLine": true }],