README example implies request instead of response parameter

[nitind]

The repository README implies that the close callback will be given a request object, when it's really the proxy response object according to the relevant source.

//
// Listen for the close event on proxy.
//
proxy.on('close', function (req, socket, head) { // <-- req should be res
// view disconnected websocket connections
console.log('Client disconnected');
});

[jcrugzz]

@niallo great find! Would love a quick fix PR :).

[caioquirino]

Quick Fix PR created :)