Update composer.json

Author: compwright

composer.json

@@ -26,7 +26,7 @@
         }
     ],
     "require": {
-        "php": "^8.0",
+        "php": ">=5.6",
         "evenement/evenement": "^3.0 || ^2.0 || ^1.0",
         "fig/http-message-util": "^1.1",
         "psr/http-message": "^1.0 || ^2.0",