Bump protractor from 5.1.2 to 5.4.2 in /angular/plugins

Bumps [protractor](https://github.com/angular/protractor) from 5.1.2 to 5.4.2.
- [Release notes](https://github.com/angular/protractor/releases)
- [Changelog](https://github.com/angular/protractor/blob/master/CHANGELOG.md)
- [Commits](angular/protractor@5.1.2...5.4.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

angular/plugins/package.json

@@ -41,7 +41,7 @@
     "karma-coverage-istanbul-reporter": "^1.2.1",
     "karma-jasmine": "~1.1.0",
     "karma-jasmine-html-reporter": "^0.2.2",
-    "protractor": "~5.1.2",
+    "protractor": "~5.4.2",
     "ts-node": "~4.1.0",
     "tslint": "~5.9.1",
     "typescript": "~2.5.3"