add grunt-cli deppendency

Author: ellenmobify

package.json

@@ -14,12 +14,13 @@
     "nightwatch": "0.9.1",
     "nodeunit": "~0.8.4",
     "grunt": "0.4.5",
+    "grunt-cli": "~0.1.13",
     "grunt-eslint": "^17.0.0",
     "mobify-code-style": "^2.3.6"
   },
   "scripts": {
     "install": "node selenium/installation/install.js",
-    "test": "grunt lint; grunt test"
+    "test": "./node_modules/.bin/grunt lint; ./node_modules/.bin/grunt test"
   },
   "homepage": "https://github.com/mobify/nightwatch-commands",
   "dependencies": {