fix(deps): update dependency @angular/core to v10 [security]

Author: renovate[bot]

Phonebook.Frontend/package-lock.json

@@ -40,7 +40,7 @@
     "@angular/cdk": "9.2.4",
     "@angular/common": "9.1.12",
     "@angular/compiler": "9.1.12",
-    "@angular/core": "9.1.12",
+    "@angular/core": "10.2.5",
     "@angular/forms": "9.1.12",
     "@angular/localize": "9.1.12",
     "@angular/material": "9.2.4",