Update phpunit/phpunit requirement from ^9.5.20 to ^10.5.16

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/10.5.16/ChangeLog-10.5.md)
- [Commits](sebastianbergmann/phpunit@9.5.20...10.5.16)

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

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

composer.json

@@ -41,7 +41,7 @@
     "phpstan/extension-installer": "^1.1.0",
     "phpstan/phpstan-phpunit": "^1.1.1",
     "phpstan/phpstan-strict-rules": "^1.2.3",
-    "phpunit/phpunit": "^9.5.20",
+    "phpunit/phpunit": "^10.5.16",
     "squizlabs/php_codesniffer": "^3.6.2"
   },
   "autoload": {