test with PHP 8.5

Author: michalsn

.github/workflows/phpunit.yml

@@ -22,7 +22,7 @@ jobs:
   phpunit:
     strategy:
       matrix:
-        php-version: ['8.1', '8.2', '8.3', '8.4']
+        php-version: ['8.2', '8.3', '8.4', '8.5']
         db-platform: ['MySQLi', 'SQLite3']
         mysql-version: ['8.0']
         dependencies: ['highest']