Usage: Get keys without values.

[jcuenod]

I want to read a very large file and conditionally traverse into it. This means that I want to be able to read property keys without parsing the values. Ideally, I'd like to be able to get the type of the values as well. I can't tell whether this is a limitation of simdjson or whether it's a limitation of this wrapper.

[luizperes]

I think this is totally possible, this is more like a feature that is missing in this wrapper. I am adding this as enhancement.