Explore ramifications of rubocop versioning policy

[cjcolvar]

https://docs.rubocop.org/rubocop/0.85/versioning.html#pending-cops explains how rubocop has adopted a better approach to newly added cops instead of the new cops on by default that was part of if not the main driver for creating bixby. Is there still enough value in a shared style configuration to justify maintaining bixby? If so, how should bixby make use of this new policy? Should the NewCops cop be disabled? How often should new cops be integrated and major releases cut?