- Add last-day-of-month syntax (thx @itkrt2y).
- Add support for activesupport 7 (thx @unasuke).
- Drop support of activesupport below 5.2.
- Raise ArgumentError on inifinite loop detected (thx @nurse).
- Fix bug on day and wday specs.
- Support some alias field names.
- Add more strict validations.
- Raise errors on invalid fields (thx @eagletmt).
- Support ActiveSupport 3 and 4.
- Fix missing version dependency on ActiveSupport 4.
- Add extra 1sec sleep to adjust to exact minute.
- Schedule more accurate second.
- Chrono::Trigger was added.
- Chrono::Iterator was added.