TypeError: PushNotification.init is not a function.

Hi!

When using `raix:push@3.0.2` I get this error thrown on the client:

```
TypeError: PushNotification.init is not a function. (In 'PushNotification.init(o)', 'PushNotification.init' is undefined)
```

and the `token` event doesn't get called on iOS.

On Android it works perfectly.

When using `raix:push@2.6.12` the `token` event is called correctly on iOS and Android.

Thanks!

Start at the client-side PushNotification.init call and the token event path, comparing raix:push@3.0.2 with the working 2.6.12 behavior on iOS. Verify the change against the reported TypeError and confirm that the token event fires on iOS while Android continues to work.

Written by the indexing model from the issue text.