fix: expo-notifications compatibility with customerio-expo-plugin

[xtreem88]

Resolves: https://github.com/customerio/opsbugs/issues/3389

Solution:
Call the following in didRegisterForRemoteNotificationsWithDeviceToken delegate method.
[super application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken]

Example:

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
  [super application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken]
  return [pnHandlerObj application:application deviceToken:deviceToken];
}

[github-actions]

Pull request title looks good 👍!

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[ami-aman]

LGTM

[zdnk]

With this fix you are still overriding behavior for received push notifications etc. Event if they are not CustomerIO notifications.