Update brakeman requirement from ~> 3.3 to ~> 4.8
Update brakeman requirement from ~> 3.3 to ~> 4.8

Updates the requirements on [brakeman](https://github.com/presidentbeef/brakeman) to permit the latest version.
- [Release notes](https://github.com/presidentbeef/brakeman/releases)
- [Changelog](https://github.com/presidentbeef/brakeman/blob/master/CHANGES.md)
- [Commits](https://github.com/presidentbeef/brakeman/compare/v3.3.0...v4.8.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
akabiru/hscode,akabiru/hscode