Socket.IO 3 API support

Sample 

Find below a simple sample of how connect to Socket.IO API 3 server

// create websocket client
oClient := TsgcWebSocketClient.Create(nil);
oClient.Host := 'socketio-chat-h9jt.herokuapp.com';
oClient.Port := 443;
oClient.TLS := True;
oClient.TLSOptions.Version := tls1_2;
// create socket.io client
oSocketIO := TsgcWSAPI_SocketIO.Create(nil);
oSocketIO.Client := oClient;
oSocketIO.API := ioAPI3;
// connect
oClient.connect;

// send a message
oClient.WriteData('42["add user", "MyUser"]');