title: Deep link URL Scheme doesn't call any function in iOS App Delegate
body: <p>im implementing deep link is iOS. I have configured the URL Scheme in Project-Setting-&gt;Info-&gt;Url type
  URL Schemes :  carwash    role:Viewer</p>
  <p>when I type carwash://something the browser asks for opening the application but nothing get called in Application that I handle that what action should occur .</p>
  <p>apple documentation says you should override application(open url) in AppDelegate but deep link dosent call it and the application opens in last state</p>
  <p>application:openURL:options:' is not being called</p>
  <p>this is my code and dose not work</p>
  <pre><code>func application(_ app: UIApplication, open url: URL,
                       options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -&gt; Bool {
      fatalError()
  }
  
  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -&gt; Bool {
      if let url = launchOptions?[UIApplication.LaunchOptionsKey.url] as? URL {
          /// some
          fatalError()
      }
      GMSServices.provideAPIKey(&quot;&quot;)
  
      return true
  }
  </code></pre>