Bumps [solhint](https://github.com/protofire/solhint) from 3.0.0-rc.7 to 3.0.0-rc.8.
- [Release notes](https://github.com/protofire/solhint/releases)
- [Changelog](https://github.com/protofire/solhint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/protofire/solhint/compare/v3.0.0-rc.7...v3.0.0-rc.8)

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