title: ionic InAppBrowser Events Not Firing
body: <p>I'm Using ionic cordova in-app-browser plugin</p>
  
  <pre><code>constructor(private iab: InAppBrowser){
        const browser = this.iab.create('https://www.sample.com'_self',{location:'no'}); /*3*/
  
  this.browser.on('loadstart', event =&gt; {
      alert('loadstart event'); // not fired
      });
      this.browser.on('loaderror', event =&gt; {
        alert(' error'); // not fired
        });
      this.browser.on('exit', event =&gt; {
        alert('exit event'); // not fired
      });
  }
  </code></pre>
  
  <p>But loadstart, loaderror, exit events not working.<br>
  Thanks..!</p>