Update phpdocumentor/reflection requirement from ~4.0 to ~5.1
Update phpdocumentor/reflection requirement from ~4.0 to ~5.1

Updates the requirements on [phpdocumentor/reflection](https://github.com/phpDocumentor/Reflection) to permit the latest version.
- [Release notes](https://github.com/phpDocumentor/Reflection/releases)
- [Commits](https://github.com/phpDocumentor/Reflection/compare/4.0.0...5.1.0)

---
updated-dependencies:
- dependency-name: phpdocumentor/reflection
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
donatj/mddoc