Bump phpunit/phpunit from 9.5.21 to 9.5.28 (#101)

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.5.21 to 9.5.28.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/9.5.28/ChangeLog-9.5.md)
- [Commits](sebastianbergmann/phpunit@9.5.21...9.5.28)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

composer.json

@@ -23,7 +23,7 @@
 
 	"require-dev": {
 		"phpstan/phpstan": "v1.8.0",
-		"phpunit/phpunit": "v9.5.21"
+		"phpunit/phpunit": "v9.5.28"
 	},
 
 	"autoload": {