When `badge` is used, that's the response from FCM ``` Invalid JSON payload received. Unknown name \"badge\" at 'message.android.notification': Cannot find field. ``` I've tried removing [that](https://github.com/appfeel/node-pushnotifications/blob/master/src/utils/tools.js#L85) line and it works, also there's a badge dot icon on the phone, so `notification_count` is sufficient for Android?