Bump phpunit/phpunit from 11.5.7 to 12.3.12

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 11.5.7 to 12.3.12.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/12.3.12/ChangeLog-12.3.md)
- [Commits](sebastianbergmann/phpunit@11.5.7...12.3.12)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-version: 12.3.12
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

composer.json

@@ -26,6 +26,6 @@
         "docs": "./tools/phpdocumentor -d src -t docs"
     },
     "require-dev": {
-        "phpunit/phpunit": "^11.0"
+        "phpunit/phpunit": "^12.3"
     }
 }