chore(package): update protractor to version 6.0.0

Closes #34

Author: greenkeeper[bot]

package.json

@@ -77,7 +77,7 @@
     "karma-jasmine": "~1.1.1",
     "karma-jasmine-html-reporter": "^0.2.2",
     "nodemon": "1.15.1",
-    "protractor": "~5.3.0",
+    "protractor": "~6.0.0",
     "ts-node": "~5.0.0",
     "tslint": "~5.9.1",
     "typescript": "^2.7.2",