Update Rust crate strum_macros to 0.26.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
strum_macros	dependencies	minor	0.24.2 -> 0.26.1

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Release Notes

Peternator7/strum (strum_macros)

v0.26.0

Breaking Changes

• The EnumVariantNames macro has been renamed VariantNames. The deprecation warning should steer you in
  the right direction for fixing the warning.
• The Iterator struct generated by EnumIter now has new bounds on it. This shouldn't break code unless you manually
  added the implementation in your code.
• Display now supports format strings using named fields in the enum variant. This should be a no-op for most code.
  However, if you were outputting a string like "Hello {field}", this will now be interpretted as a format string.

New features

• The VariantArray macro has been added. This macro adds an associated constant VARIANTS to your enum. The constant
  is a &'static [Self] slice so that you can access all the variants of your enum. This only works on enums that only
  have unit variants.

  use strum::VariantArray;
  
  #[derive(Debug, VariantArray)]
  enum Color {
    Red,
    Blue,
    Green,
  }
  
  fn main() {
    println!("{:?}", Color::VARIANTS); // prints: ["Red", "Blue", "Green"]
  }

• The EnumMap macro has been experimentally added. This macro adds a new type that stores an item for each variant
  of the enum. This is useful for storing a value for each variant of an enum. This is an experimental feature because
  I'm not convinced the current api surface area is correct.

  use strum::EnumMap;
  
  #[derive(Copy, Clone, Debug, EnumMap)]
  enum Color {
    Red,
    Blue,
    Green,
  }
  
  fn main() {
    let mut counts = ColorTable::filled(0);
    for color in &[Color::Red, Color::Red, Color::Green]] {
      counts[color] += 1;
    }
  
    assert_eq!(counts[Color::Red], 2);
    assert_eq!(counts[Color::Blue], 0);
    assert_eq!(counts[Color::Green], 1);
  }

• Display has 2 new features:

  • the strum(prefix = "some_value") attribute on an enum now allows you to prepend a string onto every
    variant when you serialize it.

  • Custom to_string and serialize attributes now support string interopolation on serialization.

PR's Merged

• #​322: avoid collisions on std::fmt::Debug
• #​321: avoid conflicts with consecutive underscores.
• #​314: add additional bounds to EnumIterator
• #​311: add FusedIterator bounds to EnumIterator
• #​297: New macro, add VariantArray
• #​296: adds prefix attribute to To/From String macros.
• #​294: use named enum fields in to_string macro.

v0.25.3

Received a number of bug fix PR's.

• #​300: Fixes EnumIter for enums named Option.
• #​301: Improved doc comments
• #​304: Removed some unused Vec's
• #​305: Added generic support to EnumIs

v0.25.2

• #​289: Enables a previously disabled rustdoc.
• #​287: Fixes a bug in EnumIter code gen so that we produce ::core to
  avoid issues with shadowing modules.

v0.25.1

• #​276. Fixes #​275 and
  #​281. Not sure exactly why this broke, perhaps incompatibilities between
  syn 1 and 2. PR fixes the issue by only looking at attributes of the "list" type [attr(item, item)].

v0.25.0

Breaking Changes

• #​261 Upgrade syn dependency to version 2. This bumps the msrv to
  1.56. It's impractical to maintain a package where a core dependency of the ecosystem has a different msrv than this one.

• 270 Change the to_string behavior when using default. Now, when
  using default, the display method will return the display version of the value contained in the enum rather than
  the name of the variant.

  #[derive(strum::Display)]
  enum Color {
    Red,
    Blue,
    Green,
    #[strum(default)]
    Other(String)
  }
  
  fn main() {
    // This used to print "Other", now it prints "Purple"
    assert_eq!(Color::Other("Purple".to_string()).to_string(), "Purple");
  }

  If you want the old behavior, you can use the to_string attribute to override this behavior. See the PR for an example.

• 268 Update the behavior of EnumCount to exclude variants that are
  disabled. This is a breaking change, but the behavior makes it more consistent with other methods.

New Features

• #​257 This PR adds the EnumIs macro that automatically implements
  is_{variant_name} methods for each variant.

  #[derive(EnumIs)]
  enum Color {
      Red,
      Blue,
      Green,
  }
  
  #[test]
  fn simple_test() {
      assert!(Color::Red.is_red());
  }

v0.24.3

• #​231 Add ignore lints for EnumIter not implementing Copy or Debug
  on the generated iter struct. Copy should generally not be implemented on Iterators. Its an oversight that Debug isn't
  implemented, but it will be a breaking change to add that so it'll be added in a future version.

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