use ^8.0

since '::class' on objects is only allowed since PHP 8.0

Author: chrillep

composer.json

@@ -7,7 +7,7 @@
     ],
     "license": "MIT",
     "require": {
-        "php": "^7.3|^8.0",
+        "php": "^8.0",
         "laravel/nova": "^4.0",
         "maatwebsite/excel": "^3.1"
     },