upgrading illuminate-contracts dependency (#6)

Co-authored-by: Juan Lotito <[email protected]>

Author: Lotykun

composer.json

@@ -11,7 +11,7 @@
     "require": {
         "php": ">=7.2",
         "illuminate/http": "^7.0 || ^8.0",
-        "illuminate/contracts": "^7.0 || ^8.0"
+        "illuminate/contracts": "^7.0 || ^8.0 || ^9.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",