Does it make sense to include an `Add` method for adding a new key/value to an existing object?

[andrewheadricke]

Currently I have to convert the cbor node to JSON, then modify the doc as a interface{}, then create a byte reader and pass it back to .FromJSON() to get a new cbor node.

Would it make sense to include an Add() method so I can make my change without all the conversions?

[hsanjuan]

What happens if you .Resolve(nil) (hopefully this gets the root object), then modify, then WrapObject ? Might be able to skip the (explicit) json export. (Perhaps DecodeInto can also help if that does not work).