Exchange-calendars

Mild update to setup.py to have a clean pypi release.

What’s Changed

* ENH: Rename from trading_calendars to exchange_calendars (7) gerrymanoim

Bug Fixes

* [BUG] Add XWBO special close days on the last trading day of the year since 2017. (4) jenskeiner

Enhancements

* ENH: Part 2 of the refactor (3) gerrymanoim
* ENH: Part 1 of refactor (2) gerrymanoim

Calendar Updates
* XSES: Add 2023-09-01 (Polling Day) as a public holiday (321) philiptromans
* XBOM: Bakri Eid changed to 2023-06-29 (316) ericngqrt

Enhancements
* Add XNAS calendar alias (318) mzjp2

Maintenance
* Update and fixes for pandas 2.1.0 (327) maread99
* Update dependencies (327) maread99
* Advance Minimum Python version to 3.9 (323) maread99
* Advance Maximum Python version to 3.11 (323) maread99