This package provides support for bi-directional communication through Server Sent Events and corresponding POST requests.
This package is not intended to be a general purpose SSE package, but instead is
a bidirectional protocol for use when Websockets are unavailable. That is, both
the client and the server expose a sink and stream on which to send and
receive messages respectively.
Both the server and client have implicit assumptions on each other and therefore a client from this package must be paired with a server from this package.