v2.0.0

Added

• Attachment actions (buttons) with confirmation support
• Optional footer attachment support
• PHP strict typing
• Options resolver usage for client options

Changed

• Moved from Guzzle to PHP-HTTP
• Client::preparePayload is now private
• All classes are now final
• Nexylan namespace. It is now Nexy\Slack

Fixed

• Bug where message wouldn't get returned on send
• URL for "Send an attachment" preview

Removed

• PHP <7.1 support
• Array argument for any message and attachment object. Use chained calls instead.
• Possibility to change the endpoint. Use new instance instead.