Adds liniting into the workflow (#3082)

* initial linting of src

* fix indent to 2 spaces

* Removes unnecessary rules

* ignore spec folder for now

* Spec linting

* Fix spec indent

* nits

* nits

* no no-empty rule

spec/EventEmitterPubSub.spec.js

@@ -25,7 +25,7 @@ describe('EventEmitterPubSub', function() {
     subscriber.unsubscribe('testChannel');
     // Register mock checked for subscriber
     var isCalled = false;
-    subscriber.on('message', function(channel, message) {
+    subscriber.on('message', function() {
       isCalled = true;
     });