Update dependency phpstan/phpstan-phpunit to ^2.0.16

| datasource | package                 | from   | to     |
| ---------- | ----------------------- | ------ | ------ |
| packagist  | phpstan/phpstan-phpunit | 2.0.15 | 2.0.16 |

Author: renovate[bot]

composer.json

@@ -31,7 +31,7 @@
         "laminas/laminas-paginator": "^2.22.0",
         "laminas/laminas-validator": "^2.65.0",
         "phpstan/phpstan-deprecation-rules": "^2.0.4",
-        "phpstan/phpstan-phpunit": "^2.0.15",
+        "phpstan/phpstan-phpunit": "^2.0.16",
         "phpunit/phpunit": "^11.5.53",
         "slam/php-cs-fixer-extensions": "^3.14.0"
     },