ci: add tests for PHP 8.5

Author: Chris8934

composer.json

@@ -14,7 +14,7 @@
         "php": "^7.4 | ^8.0",
         "php-http/httplug": "^2.4",
         "psr/http-client": "^1.0.3",
-        "guzzlehttp/guzzle": "^7.4"
+        "guzzlehttp/guzzle": "^7.10"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6.31 || ^10.0 || ^11.0 || ^12.0",