Bump @angular/core from 8.2.14 to 11.0.5 in /frontend

Bumps [@angular/core](https://github.com/angular/angular/tree/HEAD/packages/core) from 8.2.14 to 11.0.5.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/11.0.5/packages/core)

---
updated-dependencies:
- dependency-name: "@angular/core"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -16,7 +16,7 @@
     "@angular/cdk": "^8.0.0",
     "@angular/common": "^8.0.0",
     "@angular/compiler": "^8.0.0",
-    "@angular/core": "^8.0.0",
+    "@angular/core": "^11.0.5",
     "@angular/forms": "^8.0.0",
     "@angular/platform-browser": "^8.0.0",
     "@angular/platform-browser-dynamic": "^8.0.0",