Update angular monorepo to v21

Author: renovate[bot]

package.json

@@ -43,11 +43,11 @@
   "homepage": "https://github.com/esm-bundle/angular__router#readme",
   "devDependencies": {
     "@angular/common": "13.3.1",
-    "@angular/compiler": "15.2.10",
-    "@angular/compiler-cli": "15.2.10",
+    "@angular/compiler": "21.0.1",
+    "@angular/compiler-cli": "21.0.1",
     "@angular/core": "13.3.1",
-    "@angular/router": "15.2.10",
-    "@angular/upgrade": "15.2.10",
+    "@angular/router": "21.0.1",
+    "@angular/upgrade": "21.0.1",
     "@rollup/plugin-babel": "6.0.4",
     "concurrently": "8.2.2",
     "esm-bundle-scripts": "1.2.0",