Require PHP 8.1

Author: kelunik

composer.json

@@ -19,7 +19,7 @@
     "minimum-stability": "beta",
     "prefer-stable": true,
     "require": {
-        "php": ">=8",
+        "php": ">=8.1",
         "ext-json": "*",
         "amphp/amp": "^3",
         "revolt/event-loop": "^1 || ^0.2",