Another missing testing dependency

package.json

@@ -39,6 +39,7 @@
     "karma": "x.x.x",
     "grunt-karma": "x.x.x",
     "karma-spec-reporter": "x.x.x",
+    "karma-phantomjs-launcher": "x.x.x",
     "karma-jasmine": "x.x.x",
     "grunt-clear": "x.x.x",
     "grunt-autoprefixer": "x.x.x",