title: Wallaby.js - Zone is needed for the async() test helper
body: <p>This is an Angular 6.x project, testing via Karma/Jasmine</p>
  
  <p>I'm not sure if this is an issue with Wallaby or not, but my tests work when running them outside of Wallaby so I think this may be a config issue...?</p>
  
  <p>Anyways, when running my tests, I get the following error in any tests attempting to use async:</p>
  
  <pre><code>Failed: Zone is needed for the async() test helper but could not be found.
  Please make sure that your environment includes zone.js/dist/zone.js
  </code></pre>
  
  <p>I have searched for hours but not found a solution. I feel like Zone needs to be included globally via Wallaby settings somehow because the tests run fine when I run the Angular standard test runner.</p>
  
  <p>Are you supposed to somehow globally import Zone.js into Wallaby somewhere? I haven't seen this issue in other projects but this is my first time using Wallaby against the new Angular CLI standard format.</p>