Changes
- #1237 Fix #1236 Add video block to Block Kit model classes - Thanks @seratch
- #1241 Fix #1240 Update chat_unfurl to support source/unfurl_id parameters - Thanks @seratch @angrychimp
- #1234 #1235 Fix many type hint errors - Thanks @ehdgua01
- All issues/pull requests: https://github.com/slackapi/python-slack-sdk/milestone/54?closed=1
- All changes: v3.17.2...v3.18.0