Match devDependencies versions with each other

Use same angular-mocks dependency version as angular-messages to prevent conflicts during `bower install`

Author: neilsh

bower.json

@@ -34,7 +34,7 @@
     "jquery": "~2.1.4"
   },
   "devDependencies": {
-    "angular-mocks": "~1.4.1",
+    "angular-mocks": "^1.6.2",
     "angular-messages": "^1.6.2"
   },
   "homepage": "https://github.com/turinggroup/angular-validator"