Thanks for checking out the 2.0.0 release of Bolt for JavaScript! Firstly, a huge thank you to all of the folks who contributed to this release. A special shoutout to community contributor @barlock for the massive contributions he contributed!

Make sure to read the migrating to 2.0.0 guide to learn what changes are needed to upgrade your existing Bolt for JavaScript apps.

Chaining middleware via promises. This allows the ability to test listeners and middlewares without artificial delays. This change also allows Bolt to run on Functions-as-a-Service platforms (such as AWS Lambda) by allowing the processBeforeResponse option to be used. (#353, #380, #381, #439, #440, #444) - Thanks @barlock, @aoberoi, @stevengill and @seratch
Message shortcuts (previously referred to as message actions) now use the shortcut() method instead of the action() method. (#428) - Thanks @stevengill
Fix View type missing optional id from response (#436, #437) - Thanks @seratch
Added Migration Guide for @slack/bolt@2.0.0 (#442, #445, #449) - Thanks @stevengill
Added processBeforeResponse to App[Options] to improve Bolt support for Function-as-a-Service platforms (like AWS Lambda) (#444) - Thanks @stevengill
Set minimum TypeScript version to 3.7.0 (#447, #452) - Thanks @aoberoi and @stevengill