build: update to angular-v9.1.12 (#1215)

Fixes: #1216

src/app/shared/form-dialog/form-dialog.component.ts

@@ -1,5 +1,5 @@
 import { Component, OnInit, Inject } from '@angular/core';
-import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';
+import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material/dialog';
 import { FormGroup } from '@angular/forms';
 
 import { FormfieldBase } from './formfield/model/formfield-base';

src/app/shared/form-dialog/form-group.service.spec.ts

@@ -6,7 +6,7 @@ describe('FormGroupService', () => {
   beforeEach(() => TestBed.configureTestingModule({}));
 
   it('should be created', () => {
-    const service: FormGroupService = TestBed.get(FormGroupService);
+    const service: FormGroupService = TestBed.inject(FormGroupService);
     expect(service).toBeTruthy();
   });
 });