fiber_pylon_io library

The pieces of pylon that need dart:io.

Kept out of package:fiber_pylon/fiber_pylon.dart so that importing pylon does not stop a project from compiling for the web. A project that runs on a desktop or a device imports this as well; one that also targets the web supplies its own SocketLink over a socket library that works there.

Classes

A SocketLink over the WebSocket of dart:io.