Bump spin from 0.9.4 to 0.9.8 in /kernel-rs

[dependabot[bot]]

Bumps spin from 0.9.4 to 0.9.8.

Changelog

Sourced from spin's changelog.

[0.9.8] - 2023-04-03

Fixed

• Unsoundness in Once::try_call_once caused by an Err(_) result

[0.9.7] - 2023-03-27

Fixed

• Relaxed accidentally restricted Send/Sync bounds for Mutex guards

[0.9.6] - 2023-03-13

Fixed

• Relaxed accidentally restricted Send/Sync bounds for RwLock guards

[0.9.5] - 2023-02-07

Added

• FairMutex, a new mutex implementation that reduces writer starvation.
• A MSRV policy: Rust 1.38 is currently required

Changed

• The crate's CI now has full MIRI integration, further improving the confidence you can have in the implementation.

Fixed

• Ensured that the crate's abstractions comply with stacked borrows rules.
• Unsoundness in the RwLock that could be triggered via a reader overflow
• Relaxed various Send/Sync bound requirements to make the crate more flexible

Commits

• See full diff in compare view

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