`encodeBinaryJSON`, `decodeBinaryJSON` error handling and flags

[jscheid]

Hi, thanks for this lib. I'm working on small improvements to encodeBinaryJSON and decodeBinaryJSON:

• Return a QuickJSContextResult<QuickJSHandle> instead of a QuickJSHandle, to surface any errors.
• Accept flags and pass them through, instead of hardwiring JS_WRITE_OBJ_REFERENCE for encode and no flags for decode.

I've noticed that there are a few PRs open and not much activity in recent months, so before I open a new PR I just wanted to check to see if you're interested in these improvements? If so we'd also have to discuss backward compatibility.

[justjake]

If you open a PR, I'll merge it if the tests pass :)