composer(deps-dev): bump phpunit/phpunit from 10.2.6 to 10.3.1

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 10.2.6 to 10.3.1.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.3.1/ChangeLog-10.3.md)
- [Commits](sebastianbergmann/phpunit@10.2.6...10.3.1)

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

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

Author: dependabot[bot]

composer.json

@@ -60,7 +60,7 @@
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-webmozart-assert": "^1.2",
-        "phpunit/phpunit": "^10.2",
+        "phpunit/phpunit": "^10.3",
         "psalm/plugin-phpunit": "^0.18.4",
         "qossmic/deptrac-shim": "^1.0.2",
         "rector/rector": "^0.17.6",