Add support for Laravel 5.x (#40)

Author: alancolant

composer.json

@@ -16,7 +16,7 @@
     "license": "MIT",
     "require": {
         "php": ">=8.1",
-        "laravel/nova": "^4.0"
+        "laravel/nova": "^4.0 || ^5.0"
     },
     "autoload": {
         "psr-4": {