chore(deps): update rust crate which to v8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
which	dependencies	major	7.0 → 8.0

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Release Notes

harryfei/which-rs (which)

v8.0.5

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• Bug fix: #​126 Do not use current directory for search when provided path is absolute. Thanks @​weifanglab for your contribution to which!

v8.0.4

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• On Windows we now emit a NonFatalError if the PATHEXT environment variable is not populated, and the query did not specify a file extension.

v8.0.3

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• Add fallback implementation of is_valid_executable allowing which-rs to compile on targets which are not Unix, Windows, WASI, or Redox. Thanks @​pmikolajczyk41 for your contribution to which!

v8.0.2

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• Dependency on home_env removed, the implementation found in rust 1.85.0 for a home directory has been fixed.
  Thanks, [@​madsmtm],(https://github.com/madsmtm) for this contribution to which!
• Dependency on winsafe removed, code for Windows API is now handwritten.
• Dependency on rustix removed, we now depend on libc directly to reduce compile times.

v8.0.1

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• Fix Windows bug reported in #​108 (comment)

v8.0.0

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• Add new Sys trait to allow abstracting over the underlying filesystem. Particularly useful for wasm32-unknown-unknown targets. Thanks @​dsherret for this contribution to which!
• Add more debug level tracing for otherwise silent I/O errors.
• Call the NonFatalHandler in more places to catch previously ignored I/O errors.
• Remove use of the either dependency.

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