Firebase Legacy HTTP API discontinued by June 20, 2024

[sjkummer]

Hey @eladnava

Google informed that the "Legacy HTTP" API used by this library will be discontinued by June 20, 2024.

This library has not been updated for a while. Do you plan to implement the new API or would you recommend to switch to Googles FCM Admin lib? https://www.npmjs.com/package/firebase-admin

Migration Guide: https://firebase.google.com/docs/cloud-messaging/migrate-v1?hl=en

Best regards and thanks for maintaining all the years.