Upgrade to Angular 21

angular.json

@@ -18,12 +18,14 @@
       "prefix": "app",
       "architect": {
         "build": {
-          "builder": "@angular-devkit/build-angular:browser",
+          "builder": "@angular-devkit/build-angular:application",
           "options": {
             "outputPath": "dist/testowy",
             "index": "src/index.html",
-            "main": "src/main.ts",
-            "polyfills": "src/polyfills.ts",
+            "browser": "src/main.ts",
+            "polyfills": [
+              "zone.js"
+            ],
             "tsConfig": "tsconfig.app.json",
             "inlineStyleLanguage": "scss",
             "assets": [
@@ -59,12 +61,9 @@
               "outputHashing": "all"
             },
             "development": {
-              "buildOptimizer": false,
               "optimization": false,
-              "vendorChunk": true,
               "extractLicenses": false,
-              "sourceMap": true,
-              "namedChunks": true
+              "sourceMap": true
             }
           },
           "defaultConfiguration": "production"
@@ -73,10 +72,10 @@
           "builder": "@angular-devkit/build-angular:dev-server",
           "configurations": {
             "production": {
-              "browserTarget": "testowy:build:production"
+              "buildTarget": "testowy:build:production"
             },
             "development": {
-              "browserTarget": "testowy:build:development"
+              "buildTarget": "testowy:build:development"
             }
           },
           "defaultConfiguration": "development"
@@ -84,14 +83,16 @@
         "extract-i18n": {
           "builder": "@angular-devkit/build-angular:extract-i18n",
           "options": {
-            "browserTarget": "testowy:build"
+            "buildTarget": "testowy:build"
           }
         },
         "test": {
           "builder": "@angular-devkit/build-angular:karma",
           "options": {
-            "main": "src/test.ts",
-            "polyfills": "src/polyfills.ts",
+            "polyfills": [
+              "zone.js",
+              "zone.js/testing"
+            ],
             "tsConfig": "tsconfig.spec.json",
             "karmaConfig": "karma.conf.js",
             "inlineStyleLanguage": "scss",
@@ -108,6 +109,5 @@
         }
       }
     }
-  },
-  "defaultProject": "testowy"
+  }
 }