version 3.1.1

Changes

• #908 #900 WebClient#files_upload fails with the default team_id param for Org-wide installations - Thanks @gburek-fastly @seratch
• #909 #901 Incorrect type hint for WebClient#files_upload's file argument - Thanks @gburek-fastly @seratch
• #904 Fix #903 by parsing in ActionsBlock - Thanks @KharchenkoDmitriy
• #896 Update WebClient to accept not only list but also tuple - Thanks @seratch

The following changes are related to documents and tutorial contents:

• #897 Improve code in the PythOnBoardingBot tutorial - Thanks @stephenfrench9
• #890 Fix #889 by correcting the team_join event handler in the PythOnBoardingBot tutorial - Thanks @spectreConstantine @seratch

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• All issues/pull requests: https://github.com/slackapi/python-slack-sdk/milestone/21?closed=1
• All changes: v3.1.0...v3.1.1