composer(deps-dev): Bump phpunit/phpunit from 10.2.7 to 10.3.1

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.2.7 to 10.3.1.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.3.1/ChangeLog-10.3.md)
- [Commits](sebastianbergmann/phpunit@10.2.7...10.3.1)

---
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

@@ -28,7 +28,7 @@
     "ergebnis/php-cs-fixer-config": "^5.12.0",
     "ergebnis/phpunit-slow-test-detector": "^2.3.0",
     "infection/infection": "~0.27.0",
-    "phpunit/phpunit": "^10.2.7",
+    "phpunit/phpunit": "^10.3.1",
     "psalm/plugin-phpunit": "~0.18.4",
     "rector/rector": "~0.17.10",
     "vimeo/psalm": "^5.13.1"