Update half requirement from 1.8 to 2.1

[dependabot[bot]]

Updates the requirements on half to permit the latest version.

Release notes

Sourced from half's releases.

2.1.0

Added

• Add support for target_arch spirv. Some traits and functions are unavailble on this architecture. By @​charles-r-earp.
• Add total_cmp method to both float types. Closes #55, by @​joseluis.

Changelog

Sourced from half's changelog.

[2.1.0] - 2022-07-18

Added

• Add support for target_arch spirv. Some traits and functions are unavailble on this architecture. By [@​charles-r-earp].
• Add total_cmp method to both float types. Closes #55, by [@​joseluis].

[2.0.0] - 2022-06-21

Changed

• Breaking Change Minimum supported Rust version is now 1.58.
• Breaking Change std is now enabled as a default cargo feature. Disable default features to continue using no_std support.
• Migrated to Rust Edition 2021.
• Added #[must_use] attributes to functions, as appropriate.

Fixed

• Fix a soundness bug with slice::as_ptr not correctly using mutable reference. By [@​Nilstrieb].

Added

• Added const conversion methods to both f16 and bf16. These methods never use hardware intrinsics, unlike the current conversion methods, which is why they are separated into new methods. The following const methods were added:
  • from_f32_const
  • from_f64_const
  • to_f32_const
  • to_f64_const
• Added Neg trait support for borrowed values &f16 and &bf16. By [@​pthariensflame].
• Added AsPrimitive implementations from and to self, usize, and isize. By [@​kali].

Removed

• Breaking Change The deprecated serialize cargo feature has been removed. Use serde cargo feature instead.
• Breaking Change The deprecated consts module has been removed. Use associated constants on f16 instead.
• Breaking Change The following deprecated functions have been removed:
  • f16::as_bits
  • slice::from_bits_mut
  • slice::to_bits_mut
  • slice::from_bits
  • slice::to_bits
  • vec::from_bits
  • vec::to_bits

[1.8.2] - 2021-10-22

Fixed

• Remove cargo resolver=2 from manifest to resolve errors in older versions of Rust that still worked with 1.8.0. Going forward, MSRV increases will be major version increases. Fixes #48.

[1.8.1] - 2021-10-21 - Yanked

Yanked

Not recommended due to introducing compilation error in Rust versions that worked with 1.8.0.

... (truncated)

Commits

• ebc0b1f bump version to 2.1.0
• 9261c52 update changelog
• a24dda4 Merge pull request #57 from joseluis/total-cmp
• a4e1464 add total_cmp method
• 445c936 update changelog with spirv support
• e231659 Merge pull request #56 from charles-r-earp/spirv
• 043e754 rustfmt
• d157509 For target_arch = "spirv", disabled Debug and replaced leading_zeros.
• 24bac93 Merge remote-tracking branch 'upstream/main' into main
• 7ae587c Version bump for release
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #333.