multiplexes a stream by creating multiple stream.PassThrough
streams and writing all chunks to them.
const muks = require("muks");
somestream.pipe(muks(
function(stream1){
stream1.on("data", console.log);
},
function(stream2){
stream2.pipe(somewhere);
},
function(stream3){
stream3.pipe(somewhere_else);
},
// ...
))