Added Laravel 9 support

Author: jozefbalun

Diff for: composer.json

@@ -17,7 +17,7 @@
     "require": {
         "php": "^7.4|^8.0",
         "godruoyi/php-snowflake": "^1.0",
-        "illuminate/contracts": "^8.0",
+        "illuminate/contracts": "^8.0|^9.0",
         "spatie/laravel-package-tools": "^1.1"
     },
     "require-dev": {