Init Laravel 9 support

Author: ifox

composer.json

@@ -13,9 +13,9 @@
 
     "require": {
         "php": ">=7.1.3",
-        "illuminate/support": "^7.0|^8.0",
-        "illuminate/database": "^7.0|^8.0",
-        "illuminate/events": "^7.0|^8.0"
+        "illuminate/support": "^7.0|^8.0|^9.0",
+        "illuminate/database": "^7.0|^8.0|^9.0",
+        "illuminate/events": "^7.0|^8.0|^9.0"
     },
 
     "autoload": {
@@ -25,7 +25,7 @@
     },
 
     "require-dev": {
-        "phpunit/phpunit": "7.*"
+        "phpunit/phpunit": "7.*|8.*|9.*"
     },
 
     "minimum-stability": "dev",