fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:jasmine-core:20180216

Author: snyk-test

package-lock.json

@@ -39,7 +39,7 @@
     "karma-coverage-istanbul-reporter": "~2.0.1",
     "karma-jasmine": "~2.0.1",
     "karma-jasmine-html-reporter": "^1.4.0",
-    "protractor": "~5.4.0",
+    "protractor": "~6.0.0",
     "ts-node": "~7.0.0",
     "tslint": "~5.15.0",
     "typescript": "~3.4.3"