title: cordova-plugin-firebase working in android but not in ios
body: <p>I'm developing a phonegap mobile app for ios and android and building it with phonegap cli. 
  I have installed cordova-plugin-firebase for push notifications.</p>
  
  <p>Following instructions in <a href="https://www.npmjs.com/package/cordova-plugin-firebase" rel="nofollow noreferrer">https://www.npmjs.com/package/cordova-plugin-firebase</a></p>
  
  <p>In Android:
  I have downloaded google-services.json and placed it in platforms/android folder.
  I'm testing the app in a device and push notifications are working.</p>
  
  <p>In iOS:
  I have downloaded GoogleService-Info.plist and placed it in platforms/ios/[My Project]/Resources folder.
  I'm testing the app in a device but push notifications are not working.</p>
  
  <p>Any help?
  Thanks</p>
  
  <p>EDITED</p>
  
  <p>In my app.js now I have included window.FirebasePlugin.grantPermission() but still is not working:</p>
  
  <pre><code>var app = new Framework7({
  root: '#app', // App root element
  ...
  on: {
      init: function () {
          if (Framework7.device.ios) {
              window.FirebasePlugin.grantPermission();
          }
      },
  },
  ...
  });
  </code></pre>
  
  <p>Is that incorrect?</p>