WebSocket transport doesn't fire close event when a connection fails

[flowersinthesand]

ws 0.7.2's implementation emulates The WebSocket API by W3C but its behavior on connection fail is little different. Typically, browsers fire error event and then close event but ws module fires error event only.

Whatever the reason, it's right that transport should fire close event if it couldn't establish a connection. FYI, the above issue is reported to websockets/ws#505