⬆️ #10: Upgrade angular-cli monorepo to v20

Author: renovate[bot]

package.json

@@ -23,8 +23,8 @@
     "zone.js": "~0.12.0"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^15.1.4",
-    "@angular/cli": "~15.1.4",
+    "@angular-devkit/build-angular": "^20.0.0",
+    "@angular/cli": "~20.0.0",
     "@angular/compiler-cli": "^15.1.0",
     "@types/jasmine": "~4.3.0",
     "jasmine-core": "~4.5.0",