v2.0.0-rc.21

Lots to be announced in this release - some big changes that have significantly improved the maturity of the lib. Namely:

• Bot API 6.8 support #100
• Support for abstracting away the dispatcher handler, making it possible to extend the dispatcher with custom metrics #103 (as demonstrated in #112)
• Thread-safe support for adding/removing handlers #47
• Thread-safe support for adding/remove bots when using the multibot updater #98
• Added support for premium emoji in markdown #96
• Improved polling startup logic by calling deletewebhook to purge pending updates #94
• Add a new filter for "story" type messages #104
• Add a new ResponseParameters field to telegram errors - thank you @liuerfire! #107
• Improved the local workflow by improving golangci-lint checks #110
• Various cleanups and documentation improvements

Please note that this version does include some breaking changes; if you're having issues upgrading, let us know in the t.me/gotgbotChat and I'll be happy to help you upgrade.

Fingers crossed this gets us yet another step closer to a stable version!