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

src/cli/utils/parsers.js

@@ -46,7 +46,7 @@ export function moduleOrObjectParser(opt) {
   }
   try {
     return JSON.parse(opt);
-  } catch(e) {}
+  } catch(e) { /* */ }
   return opt;
 }