Enhancements:
- Improve rubocop setup in the new gem template #4220
- Support repositories with default branch not named master #4224
Bug fixes:
- Let Net::HTTP decompress the index instead of doing it manually #4081
- Workaround for another jruby crash when autoloading a constant #4252
- Fix another performance regression in the resolver #4243
- Restore support for old git versions #4233
- Give a proper error if cache path does not have write access #4215
- Fix running
rake releasefrom an ambiguous ref #4219