add laravel 9 support

Author: Ikstar

composer.json

@@ -18,8 +18,8 @@
     "require": {
         "php": "^7.2|~8.0.0| ^8.1",
         "kreait/firebase-php": "^6.0",
-        "illuminate/contracts": "^6.0|^7.0|^8.0",
-        "illuminate/support": "^6.0|^7.0|^8.0"
+        "illuminate/contracts": "^6.0|^7.0|^8.0|^9.0",
+        "illuminate/support": "^6.0|^7.0|^8.0|^9.0"
     },
     "require-dev": {
         "orchestra/testbench": "^4.0|^5.0|^6.0",