Support tuning parameters?

I’m working on a proposal for a WebSocket extension to compress via Zstd. Toward that end I’d like to be able to control the window size, à la:
```
ZSTD_CCtx_setParameter( cctx, ZSTD_c_windowLog, 20 );
```
Currently I don’t see support for this in the API that this module exposes. Would it be possible to add?