build(deps): bump once_cell from 1.4.0 to 1.7.2

[dependabot]

Bumps once_cell from 1.4.0 to 1.7.2.

Changelog

Sourced from once_cell's changelog.

1.7.2

• Improve code size when using parking_lot feature.

1.7.1

• Fix race::OnceBox<T> to also impl Default even if T doesn't impl Default.

1.7.0

• Hide the race module behind (default) race feature. Turns out that adding race by default was a breaking change on some platforms without atomics. In this release, we make the module opt-out. Technically, this is a breaking change for those who use race with no_default_features. Given that the race module itself only several days old, the breakage is deemed acceptable.

1.6.0

• Add Lazy::into_value
• Stabilize once_cell::race module for "first one wins" no_std-compatible initialization flavor.
• Migrate from deprecated compare_and_swap to compare_exchange.

1.5.2

• OnceBox API uses Box<T>. This a breaking change to unstable API.

1.5.1

• MSRV is increased to 1.36.0.
• document once_cell::race module.
• introduce alloc feature for OnceBox.
• fix OnceBox::set.

1.5.0

• add new once_cell::race module for "first one wins" no_std-compatible initialization flavor. The API is provisional, subject to change and is gated by the unstable cargo feature.

1.4.1

• upgrade parking_lot to 0.11.0
• make sync::OnceCell<T> pass https://doc.rust-lang.org/nomicon/dropck.html#an-escape-hatch[dropck] with parking_lot feature enabled. This fixes a (minor) semver-incompatible changed introduced in 1.4.0

Commits

• 6286eac Merge #142
• 3872664 publish 1.7.2
• 7fcca37 Merge #140
• 44ea2f2 Update
• f1272e5 Use initialize_inner
• 9623f71 Improve imp_pl size
• 2a769dd Merge #141
• 9f97e64 Bump to v1.7.1
• 526ac09 Also run alloc tests in CI.
• a52c8ee Fix race::OnceBox<T>: Default to not require T: Default
• Additional commits viewable in compare view

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