The default attribute on a tuple like variant now causes the to_string
and display format to use the value of the tuple rather than the name
of the variant.
E.g. Color::Green("lime").to_string() will equal "lime" not "Green"
Fixes: how to round trip Display and EnumString with default="true" #86
BREAKING CHANGE
This changes how Display and ToString cause the following to renders:
```rust
#[strum(default)]
Green(String)
```
To maintain the previous behavior (use the variant name):
```rust
#[strum(default, to_string("Green"))]
Green(String)
```
* add clippy.toml with an msrv
* fix clippy lints
* replace inefficient algorithm
* replace ::std with ::core in more places and comments
* fix some test warnings
* fix clippy lints in tests
* Run rustfmt over repository.
* Bump `syn` to 0.15
* Implemented ability to `serialize_all` using cases from `heck`.
Issue #21
* Use `path` and `version` in dependency specifications.
Issue #21
* Updated documentation.
Issue #21
* Added `CHANGELOG.md`.
* Also convert case when deriving `Display`.
Issue #21
* Added `EnumDiscriminants` derive.
Issue #33
* Added the ability to rename derived `EnumDiscriminants`.
Issue #33
* Updated `README.md` and lib.rs docs.
Issue #33
* Updated `CHANGELOG.md`.
Issue #33
* WIP: refactoring to allow attributes on discriminants enum.
* Use single `strum_discriminants` top level attribute.
Issue #33
* Allow multiple declarations of `strum_discriminants` attribute.
Issue #33
* Pass through all other attributes to discriminant enum.
Issue #33
* Add `impl From<MyEnum> for MyEnumDiscriminants`.
Issue #33
* Add `impl<'_enum> From<&'_enum MyEnum> for MyEnumDiscriminants`.
Issue #33
* Added complex case test for `From` derivation.
Issue #33
* Added docs to some helper functions.
* Added docs about `From` impls.
Issue #33
