v0.4.0 2022-06-15T20:34:11+0900
  - Add calendar data of 2023

v0.3.0 2021-06-03T23:34:33+0900
  - Update calendar data of 2021
  - Add calendar data of 2022

v0.2.0 2020-05-31T23:40:24+0800
  - Add calendar data from 2013 to 2021.

v0.1.1 2020-05-25T10:28:44+0800
  - Fix the syntax error in v0.1.0

v0.1.0 2020-05-17T22:30:35+0800
  - First release!
  - While this can be used by itself, integration with Date::Holidays should just work