v3.27.0

Changes

• #1459 Fix #1458 internal error within aiohttp-based socket mode client - Thanks @seratch @jhofeditz
• #1450 #1452 Add "slack_file" properties to "image" blocks/elements under slack_sdk.models - Thanks @seratch
• #1455 #1456 Can't install async (optional) dependencies in 3.26.2 - Thanks @drasmuss @WilliamBergamin
• #1449 feat: add download badge in readme - Thanks @WilliamBergamin

---

• All issues/pull requests: https://github.com/slackapi/python-slack-sdk/milestone/91?closed=1
• All changes: https://github.com/slackapi/python-slack-sdk/compare/v3.26.2...v3.27.0