Fixed missing comma

Author: kdietrich

package.json

@@ -34,7 +34,7 @@
     "karma-jasmine": "^0.3.7",
     "karma-phantomjs-launcher": "^1.0.0",
     "phantomjs": "^2.1.3",
-    "phantomjs-prebuilt": "^2.1.4"
+    "phantomjs-prebuilt": "^2.1.4",
     "grunt-contrib-watch": "^0.6.1",
     "grunt-jscs": "^2.7.0"
   }