dblock/slack-sup

### Changelog

* 2024/10/31: Fix: subscribe and change cc for teams with special characters in name - [@dblock](https://github.com/dblock).
* 2024/10/27: Replaced gcal link by a button - [@dblock](https://github.com/dblock).
* 2024/10/27: Added collections of missed and matched users to rounds API - [@dblock](https://github.com/dblock).
* 2024/10/27: Added captain's username to S'Up API - [@dblock](https://github.com/dblock).
* 2024/10/27: Added round stats to API - [@dblock](https://github.com/dblock).
* 2024/10/12: Upgraded to Ruby 3.3.5 - [@dblock](https://github.com/dblock).
* 2024/07/27: Only send reminders after S'Up time of day - [@dblock](https://github.com/dblock).
* 2024/05/03: Fix incorrect list of admins listed in `set` errors - [@dblock](https://github.com/dblock).
* 2023/12/01: Added promote/demote @mention - [@dblock](https://github.com/dblock).
* 2023/06/19: Fix [#131](https://github.com/dblock/slack-sup/issues/131), odd user added to more than 1 sup - [@dblock](https://github.com/dblock).
* 2023/02/18: Added `set sync now` for admins to manually sync users - [@dblock](https://github.com/dblock).
* 2023/02/18: Fix [#118](https://github.com/dblock/slack-sup/issues/118), link to TimeZone values - [@dblock](https://github.com/dblock).
* 2023/01/21: Upgraded to Ruby 2.7.7 - [@dblock](https://github.com/dblock).
* 10/1/2022: Display and set time zone in `set time` - [@dblock](https://github.com/dblock).
* 10/1/2022: Migrated to new Google Identity Services library for gcal - [@dblock](https://github.com/dblock).
* 1/2/2021: Will sync user when opting in/out before an initial sync - [@dblock](https://github.com/dblock).
* 1/2/2021: Added a "We Haven't Met Yet" option to meeting response - [@dblock](https://github.com/dblock).
* 6/26/2020: Toggle opt in state for new users with `set opt in` and `out` - [@dblock](https://github.com/dblock).
* 6/14/2020: Added `next` to show next sup - [@dblock](https://github.com/dblock).
* 6/13/2020: Added `set odd` to toggle odd user behavior - [@dblock](https://github.com/dblock).
* 6/13/2020: Add odd remaining user to an existing S'Up - [@dblock](https://github.com/dblock).
* 6/13/2020: Generate an additional S'Up if number of users not divisible by size - [@dblock](https://github.com/dblock).
* 6/13/2020: Show opt in and missed numbers in rounds - [@dblock](https://github.com/dblock).
* 4/11/2020: Added unsubscribe - [@dblock](https://github.com/dblock).
* 7/2/2018: Added stats per round - [@dblock](https://github.com/dblock).
* 9/25/2017: Configure followup day - [@ashkan18](https://github.com/ashkan18).
* 9/4/2017: Added optional API token - [@dblock](https://github.com/dblock).
* 8/27/2017: Skip users on vacation - [@dblock](https://github.com/dblock).
* 8/25/2017: Add Google calendar integration - [@dblock](https://github.com/dblock).
* 8/24/2017: Customize sup messages - [@dblock](https://github.com/dblock).
* 8/16/2017: Initial public release, Artsy hackathon 2017 - [@dblock](https://github.com/dblock).