Update dependency phpunit/phpunit to v12

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| packagist  | phpunit/phpunit | 10.5.37 | 12.0.2 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Diff for: composer.json

@@ -16,7 +16,7 @@
         "doctrine/annotations": "^2.0.1",
         "laminas/laminas-coding-standard": "^3.0.0",
         "laminas/laminas-stdlib": "^3.18.0",
-        "phpunit/phpunit": "^10.5.37",
+        "phpunit/phpunit": "^12.0.0",
         "psalm/plugin-phpunit": "^0.19.0",
         "vimeo/psalm": "^5.15.0"
     },