Add PHP 8.5 to test matrix (#187)

Author: nie7321

.github/workflows/phpunit.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        php-versions: ['8.2', '8.3', '8.4']
+        php-versions: ['8.2', '8.3', '8.4', '8.5']
 
     steps:
     - uses: actions/checkout@v4