title: Error: zone-testing.js is needed for the fakeAsync() test helper but could not be found. When running test on Angular webapp using serenityJS+Jasmine
body: <p>I am trying to run component testing on Angular web app using serenityJS + Jasmine but encountered the error below. Any idea how I can resolve this issue?</p>
  <pre><code>Message:
  Error: zone-testing.js is needed for the fakeAsync() test helper but could not be found.
          Please make sure that your environment includes zone.js/dist/zone-testing.js
  </code></pre>
  <p>Stack:
  Error: zone-testing.js is needed for the fakeAsync() test helper but could not be found.
  Please make sure that your environment includes zone.js/dist/zone-testing.js
  at resetFakeAsyncZone (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\testing\src\fake_async.ts:25:9)
  at UserContext. (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\testing\src\before_each.ts:26:5)
  at 
  at processImmediate (internal/timers.js:439:21)
  at process.topLevelDomainCallback (domain.js:131:23)
  Message:
  Error: In this configuration Angular requires Zone.js
  Stack:
  Error: In this configuration Angular requires Zone.js
  at new NgZone (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\src\zone\ng_zone.ts:129:13)
  at TestBedViewEngine._initIfNeeded (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\testing\src\test_bed.ts:409:9)
  at TestBedViewEngine.createComponent (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\testing\src\test_bed.ts:599:10)
  at Function.TestBedViewEngine.createComponent (C:\Users\zhenweiwong\Desktop\serenityjsframework\packages\core\testing\src\test_bed.ts:245:36)<br />
  at UserContext. (C:\Users\zhenweiwong\Desktop\serenityjsframework\jasmine-test\spec\app1.component.spec.ts:32:29)
  at </p>