Update phpunit/phpunit requirement from 10.* to 12.*

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/12.2.9/ChangeLog-12.2.md)
- [Commits](sebastianbergmann/phpunit@10.0.0...12.2.9)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.2.9
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -21,7 +21,7 @@
         "nails\/common": "dev-develop"
     },
     "require-dev": {
-        "phpunit/phpunit": "10.*",
+        "phpunit/phpunit": "12.*",
         "phpstan/phpstan": "2.*"
     },
     "scripts": {