chore(deps-dev): bump phpunit/phpunit from 9.6.31 to 12.5.4

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.6.31 to 12.5.4.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.5.4/ChangeLog-12.5.md)
- [Commits](sebastianbergmann/phpunit@9.6.31...12.5.4)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.5.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -19,7 +19,7 @@
   },
   "require-dev": {
     "roave/security-advisories": "dev-latest",
-    "phpunit/phpunit": "^9.6.7",
+    "phpunit/phpunit": "^12.5.4",
     "vimeo/psalm": "^6.0",
     "friendsofphp/php-cs-fixer": "^3.91",
     "fakerphp/faker": "^1.21",