# Description
This PR allows the helper attribute `nu_value(rename = "...")` to be
used on struct fields and enum variants. This allows renaming keys and
variants just like [`#[serde(rename =
"name")]`](https://serde.rs/field-attrs.html#rename). This has no
singular variants for `IntoValue` or `FromValue`, both need to use the
same (but I think this shouldn't be an issue for now).
# User-Facing Changes
Users of the derive macros `IntoValue` and `FromValue` may now use
`#[nu_value(rename = "...")]` to rename single fields, but no already
existing code will break.
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# Description
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@sholderbach mentioned that I introduced `convert_case` as a dependency
while we already had `heck` for case conversion. So in this PR replaced
the use `convert_case` with `heck`. Mostly I rebuilt the `convert_case`
API with `heck` to work with it as I like the API of `convert_case` more
than `heck`.
# User-Facing Changes
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Nothing changed, the use of `convert_case` wasn't exposed anywhere and
all case conversions are still available.
# Tests + Formatting
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No new tests required but my tests in `test_derive` captured some errors
I made while developing this change, (hurray, tests work 🎉)
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
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