chore(package): update to Protractor 4.x

Fixes angular#377

Author: gkalpak

package.json

@@ -13,7 +13,7 @@
     "karma-chrome-launcher": "^0.2.3",
     "karma-firefox-launcher": "^0.1.7",
     "karma-jasmine": "^0.3.8",
-    "protractor": "^3.2.2"
+    "protractor": "^4.0.9"
   },
   "scripts": {
     "postinstall": "bower install",