chore(package): update broccoli-jshint to version 2.1.0

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -15,7 +15,7 @@
   "devDependencies": {
     "babel-eslint": "^5.0.0",
     "broccoli-es6-module-transpiler": "^0.5.0",
-    "broccoli-jshint": "^2.0.0",
+    "broccoli-jshint": "^2.1.0",
     "broccoli-merge-trees": "^1.1.1",
     "broccoli-replace": "^0.2.0",
     "broccoli-stew": "^1.2.0",