Add preserverOrder option

[eze1214]

Imagine that I have the following XML, and the order of elements is crucial. As far as I understand, a way to handle this case does not exist.
´´´

hello world monde 42 世界 🌏 true content ´´´

It would be convenient to have an option to handle this use case. The JSON result will be more complex, but I will handle this use case appropriately.