Bump @angular/language-service from 8.2.14 to 9.0.0 (#4884)

Bumps [@angular/language-service](https://github.com/angular/angular) from 8.2.14 to 9.0.0.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/master/CHANGELOG.md)
- [Commits](angular/angular@8.2.14...9.0.0)

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

package.json

@@ -140,7 +140,7 @@
     "@angular-devkit/build-angular": "0.803.25",
     "@angular/cli": "8.3.25",
     "@angular/compiler-cli": "8.0.3",
-    "@angular/language-service": "8.2.14",
+    "@angular/language-service": "9.0.0",
     "@types/jasmine": "3.5.3",
     "@types/jasminewd2": "2.0.8",
     "@types/js-yaml": "3.12.2",