composer(deps-dev): Bump phpunit/phpunit from 9.6.9 to 10.2.3

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.6.9 to 10.2.3.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.2.3/ChangeLog-10.2.md)
- [Commits](sebastianbergmann/phpunit@9.6.9...10.2.3)

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

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

composer.json

@@ -28,7 +28,7 @@
     "ergebnis/license": "^2.1.0",
     "ergebnis/php-cs-fixer-config": "~5.10.0",
     "infection/infection": "~0.27.0",
-    "phpunit/phpunit": "^9.6.9",
+    "phpunit/phpunit": "^10.2.3",
     "psalm/plugin-phpunit": "~0.18.4",
     "vimeo/psalm": "^5.13.1"
   },