- Drop support of Ruby 2.3
- Drop support of Ruby 2.4
- Add support of Ruby 2.6
- Add support of Ruby 2.7
- Add support of Ruby 3.0
- Drop support of Rails 5.1
- Add support of Rails 6.0
- Add support of Rails 6.1
- Add binstubs to ease development
- Migrate from Travis to Github Actions
- Merge Fixnum type is deprecated (thanks thesmart)
- Merge Add #puts method to Syslogger (thanks VuokkoVuorinnen)
- Fix Severity is passed as an array in the call to the formatter
- Save uniq tags in the thread
- Improve tests