Upgrade to angular v11

overlord/src/app/receipt/receipt-dialog.component.spec.ts

@@ -1,4 +1,4 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 import { MatDialogRef } from '@angular/material/dialog';
 
 import { ReceiptDialogComponent } from './receipt-dialog.component';
@@ -7,7 +7,7 @@ describe('ReceiptDialogComponent', () => {
   let component: ReceiptDialogComponent;
   let fixture: ComponentFixture<ReceiptDialogComponent>;
 
-  beforeEach(async(() => {
+  beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
       imports: [MatDialogRef],
       declarations: [ReceiptDialogComponent],

overlord/src/app/receipt/receipt.component.spec.ts

@@ -1,4 +1,4 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 import { MatDialogModule } from '@angular/material/dialog';
 import { ReactiveFormsModule } from '@angular/forms';
 import { RouterTestingModule } from '@angular/router/testing';
@@ -9,7 +9,7 @@ describe('ReceiptComponent', () => {
   let component: ReceiptComponent;
   let fixture: ComponentFixture<ReceiptComponent>;
 
-  beforeEach(async(() => {
+  beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
       imports: [MatDialogModule, ReactiveFormsModule, RouterTestingModule],
       declarations: [ReceiptComponent],