🏠 Housekeeping
- Eliminate double CI builds on PRs (#2035) @mattbrictson
- Update gemspec with correct release notes URL, etc. (#2036) @mattbrictson
- Automatically maintain release notes using GitHub Actions (#2034) @mattbrictson
- Use a stub for $stdin during testing (#2033) @mattbrictson
- Upgrade nokogiri to fix security warning (#2031) @mattbrictson
- Exclude danger to fix Ruby 2.0.0 CI error (#2030) @mattbrictson