v7.1.1 (Hotfix release)

This releases fixes an important bug about the computation of the Thanksgiving Friday holiday in the USA.

v7.1.0

**New calendars**

- Added 27 Brazil calendars -- thanks a lot to @luismalta & @mileo, (workalendar#409 & workalendar#415)

**Enhancements**

- Added compatibility with Python 3.8 (workalendar#406).
- Added an IBGE_REGISTER to reference IBGE (brazilian) calendars with related tests (workalendar#415).
- Improve ISO registry interface by raising an error when trying to register a non-Calendar class (workalendar#412).

**Other changes**

- Fixes and additions to some Brazil calendars ; again, thanks to @luismalta & @mileo, (workalendar#409 & workalendar#415)
- Fix Denmark, re-add Christmas Eve, which is widely treated as public holiday ; thx to @KidkArolis, (workalendar#414).
- Increase Malaysia coverage by adding tests for missing Deepavali & Thaipusam.
- Increase China coverage by adding tests for special extra-holidays & extra-working days cases.

v7.0.0

v6.0.1

v6.0.0

v5.2.3

v5.2.2

v5.2.1

v5.2.0

v5.1.1

This is a bugfix release, containing a new holiday for Luxembourg calendar.