version 1.4.2

Changes

• #246 Pass the Bolt logger in default WebClient instantiation - Thanks @seratch
• Upgrade the minimum version of underlying slack_sdk to v3.4.1 - Thanks @seratch

References

• milestone: https://github.com/slackapi/bolt-python/milestone/30?closed=1
• diff: v1.4.1...v1.4.2