This release brings in several features which are merged into the wrong primary branch some time ago, plus brings working CI and fixes some tests too.
- Remove Travis CI configuration
- Fix the stderr test
- Add Ruby 3.3, 3.4 to the build matrix
- Upgrade actions/checkout from v2 to v4
- Upgrade JRuby to 9.4.12.0
- Insert an inspect on the exit status
- Don't hang on stderr
- Add 'logger' as development dependency (fixes ruby 3.4 warning)
- Use String.new to create a mutable string