title: React Native Webview handle url change listener
body: <p>it is possible to handle URL change on React Native web view.</p>
  
  <p>I try to handle with <code>onNavigationStateChange</code> listener. But it only once time firing. When the page is load firing onNavigationStateChange. And when I navigate to another page, this event not firing. </p>
  
  <p>Any idea?</p>