feat: add support for PHP 8.4

Installs cleanly, and tests run correctly.

Author: weierophinney

composer.json

@@ -8,7 +8,7 @@
         "zendhq"
     ],
     "require": {
-        "php": "^7.3.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "^7.3.0 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 || ~8.4.0",
         "ext-zendhq": "*",
         "monolog/monolog": "^2.4 || ^3.4"
     },