fix(@schematics/angular): address vulnerability in protractor

webpack-dev-server <3.11.0 and protractor <7 contains a low severity vulnerability due to one of its dependencies (yargs-parser)

See: https://npmjs.com/advisories/1500

Fixes #17642

Author: alan-agius4

packages/schematics/angular/workspace/files/package.json.template

@@ -37,7 +37,7 @@
     "karma-coverage-istanbul-reporter": "~2.1.0",
     "karma-jasmine": "~3.0.1",
     "karma-jasmine-html-reporter": "^1.4.2",
-    "protractor": "~5.4.3",<% } %>
+    "protractor": "~7.0.0",<% } %>
     "ts-node": "~8.3.0",
     "tslint": "~6.1.0",
     "typescript": "<%= latestVersions.TypeScript %>"