Important
This repository is now useless because starting in 06/2024 Google is starting to kill their old Firebase API (#23)
I decided it was not worth it to migrate this library, read (#9) to learn more.
Here is the library you should use to replace Laravel-FCM: https://github.com/kreait/firebase-php
It is very easy to implement, please consider supporting it's author (jeromegamez). As said in our discussion.