v0.23.0

Changes

Mattermost Connector Changes

• Do not parse own messages in Mattermost connector @davdr (#1776)
• Add kwargs to Message constructor in Mattermost connector @davdr (#1774)

Slack Connector Changes

• Allow Slack's BlockAction event to be matched based on action_id and block_id @ajitdsa (#1788)
• Fix nonetype iterable raw_event in slack connector @chillipeper (#1777)
• Add search messages method to Slack Connector @chillipeper (#1769)

Parser and Matcher Changes

• Add compatibility for Rasa NLU >= 2 @oleg-fiksel (#1781)

Documentation and code quality

• Add slack match_event params @ajitdsa (#1791)