added php 8 support

Author: mechelon

composer.json

@@ -16,7 +16,7 @@
         }
     ],
     "require": {
-        "php": "^7.3",
+        "php": "^7.3|^8.0",
         "illuminate/auth": "^8.0",
         "illuminate/database": "^8.0",
         "illuminate/notifications": "^8.0",