chore: bump savvy from 0.6.4 to 0.6.6 in /src/rust

[dependabot[bot]]

Bumps savvy from 0.6.4 to 0.6.6.

Changelog

Sourced from savvy's changelog.

[v0.6.6] (2024-09-04)

Bug fixes

• Fix inappropriate use of PROTECT. Thanks @​t-kalinowski!

• Handle raw identifiers (e.g. r#struct) correctly.

[v0.6.5] (2024-07-02)

New features

• Add support for raw, including ALTRAW.
  Please be aware that, while this support was added for consistency, I bet it's really rare that a raw vector is actually needed; if you want to deal with a binary data on Rust's side, your primary option should be to store it in an external pointer (of a struct you define) rather than an R's raw vector.

Minor Improvements

• Wrapper environment of a Rust struct or enum now cannot be modified by users.

• Remove the use of the following non-API calls:

  • Rf_findVarInFrame3
  • STRING_PTR
  • DATAPTR

Commits

• f45a422 chore: Release
• 458657b Update book
• a6486cf Add a NEWS item for raw identifier fix
• 5a802e0 Use unraw() on raw identifiers (#290)
• 6b216b6 Update bindgen requirement from 0.69.1 to 0.70.0 (#287)
• 11979d8 Add some notes about struct with lifetimes (#285)
• 08ed0f8 Reject lifetimed struct (#283)
• 90da95d refactor: Use R_ParseEvalString() (#280)
• f1561e4 Add a changelog item for #278
• 6e13aaa fix usage of local_protect() (#279)
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #304.