Bolt: @slack/[email protected] Release

🎁 🐛 New features / improvements: * #1391 Fix #1335 Proper use of state parameter for the OAuth CSRF protection - Thanks @seratch * #1405 Fix #1404 SocketModeReceiver app process exits when any of its event listeners throws an exception - Thanks @seratch * #1359 Fix #1358 Expose common utilities for building HTTP module based receivers - Thanks @seratch * #1406 Add more error handlers to ExpressReceiver - Thanks @seratch @Gregoor * #1392 Fix #1385 Create a signature validation function that is not tied to the request - Thanks @seratch @danerwilliams * #1393 Fix #1376 CustomRoute interface should be accessible from developers - Thanks @seratch * #1381 Fix #1380 by adding more event payload types - Thanks @seratch @aasiddiq * #1400 Fix #1397 bolt-js does not accept ssl_check requests properly - Thanks @seratch * #1340 Fix #1334 Export EnvelopedEvent interface to users - Thanks @martin-cycle * #1366 Fix #1364 Update axios to latest 0.26.1 - Thanks @seratch @msrivastav13 * #1369 Fix #1368 Log httpServer.close error only when the server exists - Thanks @sbcgua * #1336 #1401 #1403 #1407 Improve the SDK's test assets - Thanks @seratch @filmaj

📝 Document updates: * #1384 Deploy the App to Heroku with one click - Thanks @MaurizioBella

Here are all the issues / pull requests included in the release.