Notify API for bulk SMS

Hi, I recently had to implement bulk sms but didn’t want to loop since the message was always the same. Instead, I used the Twilio Notify API which allows to sent bulk SMS as long as the message is the same (https://www.twilio.com/docs/notify/quickstart/sms#smsnotification).
Instead of using indentities, I created the binding array on the fly with the numbers (https://stackoverflow.com/a/50834279).

I thought this could be a nice addition to your helper functions since your plugin already has everything except a param for the Notify Service Id required.

Hopefully you would consider it.