Update phpunit/phpunit requirement from ^9.5 to ^10.5 (#4)

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/10.5.24/ChangeLog-10.5.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...10.5.24)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "orchestra/testbench": "^7.5|^8.0",
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^10.5"
     },
     "autoload": {
         "psr-4": {