title: iOS 13 WKWebView not showing pdf file anymore
body: <p>I am using <code>WKWebView</code> to show a <code>pdf</code> file from a remote url. It was working fine in <code>iOS 12</code> but in <code>iOS 13</code> it just shows blank screen. 
  I hit same domain with an image url and that worked fine but it has some issues with <code>pdf</code> files only.</p>
  
  <pre><code>let myURL = URL(string:"somefileurl.pdf") // If I hit this url in safari, It will download a pdf file.
  let myRequest = URLRequest(url: myURL!)
  webViewPdf.load(myRequest)  
  </code></pre>