v4.0.0
- Add support for Ruby 3.1. (Tristan Dunn)
- Drop support for Ruby 2.6. (Tristan Dunn)
- Update the Pusher JS client to version 7.0.6. (Tristan Dunn)
- Require MFA for privileged operations on RubyGems. (Tristan Dunn)
- Update development and test dependencies. (Tristan Dunn)
- Replace coveralls with simplecov. (Tristan Dunn)