Update dependency phpunit/phpunit to v12

| datasource | package         | from    | to     |
| ---------- | --------------- | ------- | ------ |
| packagist  | phpunit/phpunit | 10.5.28 | 12.0.1 |


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

Author: renovate[bot]

composer.json

@@ -19,7 +19,7 @@
         "php": "~8.1.0 || ~8.2.0 || ~8.3.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^10.4",
+        "phpunit/phpunit": "^12.0",
         "psalm/plugin-phpunit": "^0.18.0",
         "squizlabs/php_codesniffer": "^3.7.1",
         "vimeo/psalm": "^5.16.0"