(Describe the goal of this PR. Mention any related Issue numbers)
- slack.web.WebClient (Web API client)
- slack.webhook.WebhookClient (Incoming Webhook, response_url sender)
- slack.web.classes (UI component builders)
- slack.rtm.RTMClient (RTM client)
- I've read and understood the Contributing Guidelines and have done my best effort to follow them.
- I've read and agree to the Code of Conduct.
- I've run
python setup.py validateafter making the changes.