Feature request add ability to serialize json into binary.

[rain1]

I have looked into few parsers in recent days and this one seems to have most friendly syntax so I wold prefer to see this library to implement serialization of json back into byte array.

So that if I get javascript object after myObject = parser.parse(new Uint8Array([....])) then later I could do something like parser.serialize(myObject) and would get back Uint8Array.

There seems to be something like that in #243. I wonder if that could be merged here?