Bump brakeman to 3.6.2
Bump brakeman to 3.6.2

Bumps [brakeman](https://github.com/presidentbeef/brakeman) from 3.5.0 to 3.6.2.
- [Release notes](https://github.com/presidentbeef/brakeman/releases/tag/v3.6.2)
- [Changelog](https://github.com/presidentbeef/brakeman/blob/master/CHANGES)
- [Commits](https://github.com/presidentbeef/brakeman/compare/v3.5.0...v3.6.2)
ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2,ministryofjustice/prison-visits-2