test: deprecate async() in favour of waitForAsync()

Author: xidedix

src/app/app.component.spec.ts

@@ -1,16 +1,16 @@
 import { RouterTestingModule } from '@angular/router/testing';
-import { TestBed, async } from '@angular/core/testing';
+import { TestBed, waitForAsync } from '@angular/core/testing';
 import { AppComponent } from './app.component';
 describe('AppComponent', () => {
-  beforeEach(async(() => {
+  beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
       declarations: [
         AppComponent
       ],
       imports: [ RouterTestingModule ]
     }).compileComponents();
   }));
-  it('should create the app', async(() => {
+  it('should create the app', waitForAsync(() => {
     const fixture = TestBed.createComponent(AppComponent);
     const app = fixture.debugElement.componentInstance;
     expect(app).toBeTruthy();

src/app/views/base/navbars/navbars.component.spec.ts

@@ -1,12 +1,12 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 
 import { NavbarsComponent } from './navbars.component';
 
 describe('NavbarsComponent', () => {
   let component: NavbarsComponent;
   let fixture: ComponentFixture<NavbarsComponent>;
 
-  beforeEach(async(() => {
+  beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
       declarations: [ NavbarsComponent ]
     })