chore(deps): update snafu requirement from ~0.8 to ~0.9

[dependabot]

Updates the requirements on snafu to permit the latest version.

Changelog

Sourced from snafu's changelog.

[0.9.0] - 2026-03-02

Added

• WhateverLocal is an alternate to Whatever that does not implement or require Send or Sync.

• Errors that do not use context selectors (e.g. opaque errors, #[snafu(context(false))] errors, or #[snafu(transparent)] errors) may now be constructed using a generic value when they are annotated with the #[snafu(source(from(generic)))] attribute.

• When using the unstable-provider-api feature flag, Report will check if each error provides a Location. When it does, the Location will be appended to the error message.

Fixed

• Opaque errors which use const generics with default values are now supported.

Changed

• Rust 1.65 is now the minimum supported Rust version. This is a breaking change.

• Rust 1.81 is now the default supported Rust version. This is a breaking change.

• Whatever implements Send and Sync, allowing it to be sent between threads. This requires that wrapped errors also implement Send and Sync. This is a breaking change.

• snafu::Location has been replaced with a type alias to the standard library's Location (specifically a reference to that type: &'static core::panic::Location<'static>). This improves interoperability and access to features. This is a breaking change.

• Opaque errors default to allowing construction from any value that implements Into for the wrapped type. The previous behavior can be restored with #[snafu(source(from(exact)))]. This is a breaking change.

• The internal implementation of #[snafu] attribute parsing has been rewritten. This should largely be unnoticeable, but some error messages and spans have been improved, and memory usage may be slightly reduced.

Removed

... (truncated)

Commits

• 978f2cc Release 0.9.0
• 9d45084 Merge pull request #552 from shepmaster/changelog
• 7007572 Update the changelog and upgrading guide in preparation for 0.9
• b02a904 Merge pull request #551 from shepmaster/reword-location-gotcha
• b5f3f7f Gate future combinator doctests with internal-dev-dependencies
• 409b798 Add assertions to Location's async doctests
• c0e8e2f Clarify what we meant by "inaccurate" and be less negative
• 4c4163b Merge pull request #549 from shepmaster/location-in-report
• e06a103 Include Location in Report
• 53ab073 Implement the fallback Error for references
• Additional commits viewable in compare view

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[pigri]

• Updated the rand dependency from version 0.9 to 0.10 in Cargo.toml.
• Added cargo fmt --check and cargo test -- --include-ignored steps to the GitHub Actions CI workflow.
• Removed unnecessary blank lines in lib.rs, version1.rs, and version2.rs for cleaner code.