Keep order of keys by default

[runiq]

Hey,

thanks a lot for this tool – just installed it and I'm already sold. <3

There's one thing I'd love, however: A way to keep the input order of the keys. Right now, convfmt always sorts the keys alphabetically, which is something I would expect behind a switch.

Again, thank you for this!

[oriontvv]

Hi, thanks for the feedback!
Unfortunately, for now most of underlying implementations of formats don't support the order of keys and rely on std sorted BTreeMap:

• Add a .sort() method to expose IndexMap::sort_keys() serde-rs/json#1014

But I'm open to experiments with IndexMap, PRs are very welcome.