Bumps [firebase/php-jwt](https://github.com/firebase/php-jwt) from 4.0.0 to 6.0.0.
- [Release notes](https://github.com/firebase/php-jwt/releases)
- [Changelog](https://github.com/firebase/php-jwt/blob/main/CHANGELOG.md)
- [Commits](https://github.com/firebase/php-jwt/compare/v4.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: firebase/php-jwt
  dependency-type: direct:production
...

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

closes #8

probably rough around the edges still