4.0 🌈

What’s Changed

Development

• Change sessions to tz-naive, times to UTC (#179) @maread99
• v4 dev: revises *window, bound*, default* and prev/next session/minute methods (#184) @maread99
• v4 dev: Rename parameters, deprecate methods and remove deprecated methods (#186) @maread99
• v4 dev: Change default side to "left" and post v4 linting (#191) @maread99

Enhancements

• Add ExchangeCalendar.is_open_at_time (#199) @maread99

Documentation

v4 dev: Update doc and tutorials for 4.0 (#194) @maread99

Calendar Changes

• Removed Whit Monday and Day of German Unity holidays in 2022 (#185) @philiptromans

Maintenance

• v4 dev: fix warnings and update trading index (#180) @maread99
• v4 dev: Advance min python version to 3.8 (#187) @maread99
• Bump actions/cache from 3.0.3 to 3.0.4 (#190) @dependabot
• Bump actions/setup-python from 3 to 4 (#193) @dependabot

Build

• Move build meta to setup.cfg, update requirements files and workflows (#198) @maread99

Master merge #201