Support Sidekiq 6 only?

[ThomasKoppensteiner]

Sidekiq 6.0.0 was released in August 2019.
I'm thinking about dropping the support for earlier Sidekiq versions.

With which Sidekiq version are use using Sidekiq::Undertaker?

@markkocera, @nilsding, @alexJunger, @diendorfersarah, @biow0lf, @agustin, @kammerer, @zoras, @majksner, @normancapule, @dmitry and @xuwupeng2000wework you all "stared" this project, that is why I want to ask you if you still need support for Sidekiq 5 or if support for Sidekiq 6 would be enough for you?

[nilsding]

Sidekiq 6 or newer is fine by me.

[kammerer]

Same for me. Thanks!

[ThomasKoppensteiner]

Done. Details see CHANGELOG