Please implement Websocket in node_io

[tejainece]

No description provided.

[pulyaevskiy]

So to clarify for myself mostly. This is about implementing:
https://api.dartlang.org/dev/2.0.0-dev.62.0/dart-io/WebSocket-class.html from dart:io.

A brief look shows that Nodejs does not come with web socket APIs included, which is kind of tricky. I wanted for this library to only cover built-in APIs. But for completeness sake we might need to make an exception.

Is there a de-facto standard package for Nodejs which everyone uses with Web sockets?

[tejainece]

This seems to be the most used: https://www.npmjs.com/package/ws