Prepare release v2.0.0.rc1

[markets]

Full diff: v1.12.0...master

@ondrejbartas @honzasterba Do you agree with this release? Since namespaces is a quite big feature (although retro-compatible with v1), I think it's good timing to start a new major. My idea is to launch it first as a release candidate and then, in some weeks, make the official v2 release.

[honzasterba]

I think versioning should be consistent with
major - breaking change
minor - new feature
patch - bugix
since this is a non breaking change a major release is not necessary, people not following the changelong may be scared to upgrade to major expecting extra work, my vote is to just bump minor

[markets]

@honzasterba I agree, consistency with SemVer when releasing libs is something good. I just feel that this release is a little different compared to others, as we introduced significant changes and a couple of major features, so would like to mark a major bump.

I think I'm gonna wait some time and convert this to a draft for now, as it seems we have another changes in the cooking: #463.

Also, I'd like to review the current configuration system (and probably refactor? better docs?). As we have a couple of modules (Sidekiq::Optionsvs Sidekiq::Cron.configure) that are not 100% clear how they need to be used.

Thanks for the feedback!

[zedtux]

Hey @markets 👋,

#463 is now closed. Any news regarding that configuration system refactoring?

Can you remove the draft mode on this PR?