title: What happened to Assert.DoesNotThrowAsync() in xUnit?
body: <p>I migrated my unit test project from version 2.0.0-beta-{something} to 2.0.0 (stable) through NuGet. It seems like <code>Assert.DoesNotThrowAsync()</code> is not available anymore.</p>
  
  <p>For Example:</p>
  
  <pre><code>[Fact]
  public void CanDeleteAllTempFiles() {
      Assert.DoesNotThrowAsync(async () =&gt; DocumentService.DeleteAllTempDocuments());
  }
  </code></pre>
  
  <p>Results in</p>
  
  <blockquote>
    <p>DocumentServiceTests.cs(11,11): Error CS0117: 'Xunit.Assert' does not contain a definition for 'DoesNotThrowAsync' (CS0117)</p>
  </blockquote>
  
  <p><strong>A workaround would be to omit the test. Is there any better solution?</strong></p>