Add illuminate/support requirement

Author: filippotoso

composer.json

@@ -21,7 +21,8 @@
         "react/socket": "~1.0",
         "spatie/macroable": "^1.0",
         "psr/container": "^1.0 || ^2.0",
-        "laravel/serializable-closure": "^1.0"
+        "laravel/serializable-closure": "^1.0",
+        "illuminate/support": "^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0"
     },
     "require-dev": {
         "codeigniter/framework": "~3.0",