⬆️ 👕 updated to eslint 2.1.0

Verified migration doc (nothing to be done)
http://eslint.org/docs/user-guide/migrating-to-2.0.0

And made sure the eslint tasks passed

spec/fixtures/module/promise.js

@@ -2,4 +2,4 @@ exports.twicePromise = function (promise) {
   return promise.then(function (value) {
     return value * 2;
   });
-}
+};