Preserve original sorting

[ttytm]

Currently, JSON bodies are sorted alphabetically by their key names. It would be great to have it at least configurable to keep the original sorting. It might yield the more expected result if sorting is opt-in.

[LucasPickering]

This is definitely a bug, I just never noticed because I always test with httpbin.org, which always sorts JSON responses alphabetically anyway. It's a simple fix.