Bump phpunit/phpunit from 9.6.20 to 11.5.3

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.6.20 to 11.5.3.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/11.5.3/ChangeLog-11.5.md)
- [Commits](sebastianbergmann/phpunit@9.6.20...11.5.3)

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

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

composer.json

@@ -12,7 +12,7 @@
         "http-interop/http-factory-guzzle": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^11.5",
         "friendsofphp/php-cs-fixer": "^3.59",
         "prestashop/php-coding-standards": "^5",
         "phpstan/phpstan": "^2",