support laravel 9 (#15)

Author: agus24

composer.json

@@ -16,8 +16,8 @@
     },
     "require": {
         "php": ">=7.1",
-        "illuminate/support": "^7.0|^8.0",
-        "illuminate/validation": "^7.0|^8.0"
+        "illuminate/support": "^7.0|^8.0|^9.0",
+        "illuminate/validation": "^7.0|^8.0|^9.0"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,