composer(deps-dev): Bump phpunit/phpunit from 10.3.5 to 10.4.0

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.3.5 to 10.4.0.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.4.0/ChangeLog-10.4.md)
- [Commits](sebastianbergmann/phpunit@10.3.5...10.4.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -30,7 +30,7 @@
     "ergebnis/php-cs-fixer-config": "~6.6.0",
     "ergebnis/phpunit-slow-test-detector": "^2.3.0",
     "infection/infection": "~0.27.3",
-    "phpunit/phpunit": "^10.3.5",
+    "phpunit/phpunit": "^10.4.0",
     "psalm/plugin-phpunit": "~0.18.4",
     "rector/rector": "~0.18.5",
     "vimeo/psalm": "^5.15.0"