chore(package): update protractor to version 5.4.0

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "karma-coverage-istanbul-reporter": "^2.0.0",
     "karma-jasmine": "~1.1.0",
     "karma-jasmine-html-reporter": "^1.0.0",
-    "protractor": "~5.3.1",
+    "protractor": "~5.4.0",
     "ts-node": "~6.0.0",
     "tslint": "~5.9.1",
     "typescript": "~2.5.3",