Support for version 4.0 of laravel-firebase (#98)

Co-authored-by: atymic <[email protected]>

Author: dododedodonl

composer.json

@@ -16,7 +16,7 @@
         "guzzlehttp/guzzle": "^6.2 || ^7.0",
         "illuminate/notifications": "~5.6 || ~6.0 || ~7.0 || ~8.0 || ~9.0",
         "illuminate/support": "~5.6 || ~6.0 || ~7.0 || ~8.0 || ~9.0",
-        "kreait/laravel-firebase": "^1.3 || ^2.1 || ^3.0",
+        "kreait/laravel-firebase": "^1.3 || ^2.1 || ^3.0 || ^4.0",
         "spatie/enum": "^2.3 || ^3.0"
     },
     "require-dev": {