Update dependency phpunit/phpunit to ^12.4.2 (#23)

| datasource | package         | from   | to     |
| ---------- | --------------- | ------ | ------ |
| packagist  | phpunit/phpunit | 12.4.1 | 12.4.2 |

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

Author: renovate[bot]

composer.json

@@ -14,7 +14,7 @@
         "php": "~8.4.0 || ~8.5.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^12.4.1",
+        "phpunit/phpunit": "^12.4.2",
         "slam/php-cs-fixer-extensions": "^3.14.0"
     },
     "autoload": {