chore(config): bump angular to v12

angular.json

@@ -22,7 +22,6 @@
             "main": "demo/main.ts",
             "polyfills": "demo/polyfills.ts",
             "tsConfig": "tsconfig.app.json",
-            "aot": true,
             "assets": [
               {
                 "glob": "favicon.ico",
@@ -48,7 +47,13 @@
               "remark-slate",
               "rxjs/internal/scheduler/asap",
               "faker"
-            ]
+            ],
+            "vendorChunk": true,
+            "extractLicenses": false,
+            "buildOptimizer": false,
+            "sourceMap": true,
+            "optimization": false,
+            "namedChunks": true
           },
           "configurations": {
             "production": {
@@ -78,7 +83,8 @@
                 }
               ]
             }
-          }
+          },
+          "defaultConfiguration": ""
         },
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",

demo/app/huge-document/huge-document.component.html

@@ -1,7 +1,7 @@
 <div class="demo-rich-editor-wrapper single">
     <slate-editable class="demo-slate-angular-editor" [editor]="editor" [(ngModel)]="value"
         (ngModelChange)="valueChange($event)" [renderElement]="renderElement()">
-        <ng-template #elementTemplate let-context="context" let-viewContext="viewContext" let-viewContext="viewContext">
+        <ng-template #elementTemplate let-context="context" let-viewContext="viewContext">
             <h1 *ngIf="context.element.type === 'heading-one'" slateElement [context]="context" [viewContext]="viewContext"
                 [viewContext]="viewContext">
             </h1>

demo/polyfills.ts

@@ -55,7 +55,7 @@
 /***************************************************************************************************
  * Zone JS is required by default for Angular itself.
  */
-import 'zone.js/dist/zone';  // Included with Angular CLI.
+import 'zone.js';  // Included with Angular CLI.
 import 'core-js/features/global-this';
 
 window['global'] = window as any;

demo/test.ts

@@ -1,6 +1,6 @@
 // This file is required by karma.conf.js and loads recursively all the .spec and framework files
 
-import 'zone.js/dist/zone-testing';
+import 'zone.js/testing';
 import { getTestBed } from '@angular/core/testing';
 import {
   BrowserDynamicTestingModule,