title: SafariViewControllerDidFinish does not fire when swiping down to dismiss
body: <p>I have a delegate on a <code>SFSafariViewController</code> that does clean up tasks in the <code>safariViewControllerDidFinish</code> event. In iOS 13+, the user is able to swipe down to dismiss, but this event is not fired in that case. I do not want to disable this gesture by enabling <code>isModalInPresentation</code>.</p>
  
  <p>Is there a way to make the <code>safariViewControllerDidFinish</code> fire for this case, or how can I detect the user swiping down to dismiss the Safari view controller?</p>