build(deps): update derive_more requirement from 0.99 to 2.1

[dependabot]

Updates the requirements on derive_more to permit the latest version.

Release notes

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2.1.1

API docs Changelog

Changelog

Sourced from derive_more's changelog.

2.1.1 - 2025-12-22

Fixed

• .as_dyn_error() method hygiene inside Error derive expansion. (#527)

2.1.0 - 2025-12-02

Added

• Support #[display(rename_all = "<casing>")] attribute to change output for implicit naming of unit enum variants or unit structs when deriving Display. (#443)
• Support #[from_str(rename_all = "<casing>")] attribute for unit enum variants and unit structs when deriving FromStr. (#467)
• Support Option fields for Error::source() in Error derive. (#459)
• Support structs with no fields in FromStr derive. (#469)
• Add PartialEq derive similar to std's one, but considering generics correctly, and implementing ne() method as well. (#473, #475)
• Add Eq derive similar to std's one, but considering generics correctly. (#479)
• Proxy-pass #[allow]/#[expect] attributes of the type in Constructor derive. (#477)
• Support Deref and DerefMut derives for enums. (#485)
• Support custom error in FromStr derive. (#494)
• Support custom error in TryInto derive. (#503)
• Support skipping fields in Add-like, AddAssign-like, Mul-like and MulAssign-like derives. (#472)

Changed

• The minimum supported Rust version (MSRV) is now Rust 1.81. (#466)
• Add-like, AddAssign-like, Mul-like and MulAssign-like derives now infer trait bounds for generics structurally (bound field types instead of type parameters directly). (#472)

Fixed

... (truncated)

Commits

• f7bb41a Correct release date
• 289988a Prepare 2.1.1 release (#529)
• d820ec6 Fix derive(Error) expansion hygiene (#527, #526)
• 5627282 Remove glob imports in derive(From) tests to mend 1.94 nightly Rust regress...
• c354bad Prepare 2.1.0 release (#521)
• 983875f Allow using enum-level attributes for non-Display formatting traits as defa...
• 2d3805b Allow skipping fields for Add/AddAssign/Mul/MulAssign-like derives (#...
• 1b5d314 Upgrade convert_case requirement from 0.9 to 0.10 version (#520)
• c32d0a0 Upgrade actions/checkout from 5 to 6 version (#519)
• 905f5a3 Upgrade convert_case crate from 0.8 to 0.9 version (#517)
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