Update phpunit/phpunit requirement from ^9.5 to ^10.1

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.1.0/ChangeLog-10.1.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...10.1.0)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

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

composer.json

@@ -38,7 +38,7 @@
         "ext-json": "*",
         "composer/composer": "^2.0",
         "maglnet/composer-require-checker": "^4.4",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^10.1",
         "rector/rector": "^0.15.7",
         "roave/infection-static-analysis-plugin": "^1.16",
         "spatie/phpunit-watcher": "^1.23",