This is a BREAKING release. The following has changed to properly matched the phoenix.js library

• message.payload.response is now automatically unwrapped and returned as message.payload for phx_reply events.
• The client now, by default, uses the JSON V2 Serializer which was added in phoenix 1.3. If you are still running 1.2 or earlier, then you will need to continue using SwiftPhoenixClient 2.x, or provide your own custom vsn, encoder and decoder to the Socket class.