Bumps [brakeman](https://github.com/presidentbeef/brakeman) from 4.7.2 to 4.8.0.
- [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/v4.7.2...v4.8.0

)

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