* Bump sidekiq from 5.2.7 to 6.0.0

Bumps [sidekiq](https://github.com/mperham/sidekiq) from 5.2.7 to 6.0.0.
- [Release notes](https://github.com/mperham/sidekiq/releases)
- [Changelog](https://github.com/mperham/sidekiq/blob/master/Changes.md)
- [Commits](https://github.com/mperham/sidekiq/compare/v5.2.7...v6.0.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* Sidekiq::Logger.logger -> Sidekiq.logger

* Drop support Ruby 2.4

* update

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Yamagishi Kazutoshi <ykzts@desire.sh>