Add support for Laravel 11 (#31)

Author: martio

composer.json

@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": "^8.0.2",
-        "illuminate/support": "^9.0|^10.0",
+        "illuminate/support": "^9.0|^10.0|^11.0",
         "laravel-workflow/laravel-workflow": "^1.0"
     },
     "require-dev": {