Added Laravel 9 support

Author: mstralka

composer.json

@@ -4,10 +4,10 @@
     "type": "library",
     "require": {
         "php": ">=7.1.3",
-        "illuminate/support": "^5.6 || ^6.0 || ^7.0 || ^8.0",
-        "illuminate/container": "^5.6 || ^6.0 || ^7.0 || ^8.0",
-        "illuminate/database": "^5.6 || ^6.0 || ^7.0 || ^8.0",
-        "illuminate/events": "^5.6 || ^6.0 || ^7.0 || ^8.0"
+        "illuminate/support": "^5.6 || ^6.0 || ^7.0 || ^8.0 || ^9.0",
+        "illuminate/container": "^5.6 || ^6.0 || ^7.0 || ^8.0 || ^9.0",
+        "illuminate/database": "^5.6 || ^6.0 || ^7.0 || ^8.0 || ^9.0",
+        "illuminate/events": "^5.6 || ^6.0 || ^7.0 || ^8.0 || ^9.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~7.0",