(feature request) withBinarySerialization for the request?

[AkosLukacs]

Hi,

Currently withBinarySerialization sets the server's response serialization to MsgPack, but the request from the client is still in JSON.
Would it possible to switch the client -> server request to messagepack as well? Or is anything blocking this?

[kerams]

This is something I was looking into in the past. I don't recall there being any blockers, but JSON serialization is baked in the request side of things a little deeper and I just didn't feel like putting in the effort into it, since the benefits would be much smaller than for binary response serialization.