• WEBSOCKET support

### normal websocket request
WEBSOCKET wss://ws.postman-echo.com/raw
Content-Type: application/json

{ "name": "jackie" }


### normal websocket request
//@name sequence messages
WEBSOCKET wss://ws.postman-echo.com/raw
Content-Type: application/json

===
{ "name": "Hello Server" }
=== wait-for-server
{
  "message": "msg-1"
}
=== wait-for-server
{
  "message": "msg-2"
}