turn on no-loop-func lint rule

Author: greggman

.eslintrc.js

@@ -90,7 +90,7 @@ module.exports = {
     'no-comma-dangle': [0],
     'no-irregular-whitespace': 2,
     'no-multi-spaces': [0],
-    'no-loop-func': 0,
+    'no-loop-func': 1,
     'no-obj-calls': 2,
     'no-redeclare': [0],
     'no-shadow': [0],