Bump sequel_enum from 0.1.1 to 0.2.0
Bumps [sequel_enum](https://github.com/planas/sequel_enum) from 0.1.1 to 0.2.0.
- [Release notes](https://github.com/planas/sequel_enum/releases)
- [Commits](https://github.com/planas/sequel_enum/compare/v0.1.1...v0.2.0)
Signed-off-by: dependabot[bot] <support@github.com>