Slack CLI v4.2.0

Version 4.2.0 of the Slack CLI has arrived!

• The slack api command can now send unauthenticated requests when no token is available or when --no-auth is specified.
• The slack api command no longer triggers a background update check when invoked with arguments (e.g., slack api chat.postMessage).
• Any Y/N select prompts now display as vertical selection, similar to the slack create command.
• We've disabled upgrade notifications for the slack manifest and slack manifest info command. The command returns JSON that may be used for scripting, and the notifications interfere with parsing the response output.