Bump phpunit/phpunit from 9.5.0 to 9.5.1

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.5.0 to 9.5.1.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-9.5.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...9.5.1)

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

Author: dependabot[bot]

composer.json

@@ -11,7 +11,7 @@
   "require": {
     "php": "^8 || ^7.4",
     "clue/block-react": "^1.4",
-    "phpunit/phpunit": "^9.4",
+    "phpunit/phpunit": "^9.5",
     "react/event-loop": "^1.1",
     "react/promise": "^2.8",
     "wyrihaximus/test-utilities": "^3.4.1"