Support PHP 8.

Author: olsgreen

composer.json

@@ -12,7 +12,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "php": "^7.4",
+        "php": ">=7.4",
         "illuminate/bus": "^6.0|^7.0|^8.0",
         "illuminate/contracts": "^6.0|^7.0|^8.0",
         "illuminate/console": "^6.0|^7.0|^8.0",