Update composer.json to include PHP 8.4

Author: JerrySmidt

composer.json

@@ -3,7 +3,7 @@
     "version": "3.5.0",
     "description": "Postcode.eu International Address API module for Magento 2. Adds autocompletion for addresses in multiple countries using official postal data.",
     "require": {
-      "php": "^7.4 || ^8.0 || ^8.1 || ^8.2 || ^8.3",
+      "php": "^7.4 || ^8.0 || ^8.1 || ^8.2 || ^8.3 || ^8.4",
       "magento/module-checkout": "~100.4"
     },
     "type": "magento2-module",