Update dependency phpunit/phpunit to v12

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| packagist  | phpunit/phpunit | 10.5.44 | 12.0.1 |


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

Author: renovate[bot]

composer.json

@@ -44,7 +44,7 @@
         "laminas/laminas-cache-storage-adapter-apcu": "^3.1.0",
         "laminas/laminas-coding-standard": "~3.0.1",
         "laminas/laminas-diactoros": "^3.5.0",
-        "phpunit/phpunit": "^10.5.44",
+        "phpunit/phpunit": "^12.0.0",
         "psalm/plugin-phpunit": "^0.19.2",
         "vimeo/psalm": "^6.4.0"
     },