Bump phpunit/phpunit from 9.5.28 to 9.6.1

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.5.28 to 9.6.1.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/main/ChangeLog-9.6.md)
- [Commits](sebastianbergmann/phpunit@9.5.28...9.6.1)

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

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

Author: dependabot[bot]

composer.json

@@ -10,7 +10,7 @@
   ],
   "require": {
     "php": "^8.2",
-    "phpunit/phpunit": "^9.5.28",
+    "phpunit/phpunit": "^9.6.1",
     "react/async": "^4.0",
     "react/event-loop": "^1.3.0",
     "react/promise": "^2.9.",