version 1.40.1

Changes

• [slack-api-client] #1327 Add team.externalTeams.list API support - Thanks @seratch
• [slack-api-client] Add new properties to Web API responses - Thanks @seratch

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• All issues/pull requests: https://github.com/slackapi/java-slack-sdk/milestone/100?closed=1
• All changes: v1.40.0...v1.40.1