fix(deps): update gavel requirement from 7.0.2 to 8.0.1
fix(deps): update gavel requirement from 7.0.2 to 8.0.1

Updates the requirements on [gavel](https://github.com/apiaryio/gavel.js) to permit the latest version.
- [Release notes](https://github.com/apiaryio/gavel.js/releases)
- [Commits](https://github.com/apiaryio/gavel.js/compare/v7.0.2...v8.0.1)

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