Bump proptest-derive from 0.5.1 to 0.6.0

[dependabot]

Bumps proptest-derive from 0.5.1 to 0.6.0.

Changelog

Sourced from proptest-derive's changelog.

0.6.0

Potential Breaking Changes

• There is a small change of breakage if you've relied on Recursive using an Arc<BoxedStrategy<T>> as Recursive now internally uses BoxedStrategy<T> instead as well as expecting a Fn(BoxedStrategy<T>) -> R instead of Fn(Arc<BoxedStrategy<T>>) -> R. In addition, the type of recursive strategies has changed from Recursive<BoxedStrategy<T>, F> to just Recursive<T, F>.

Minor changes

• Reduced indirections and heap allocations inside Recursive<T, F> somewhat.

• BoxedStrategy<T> and SBoxedStrategy<T> now use Arc internally instead of using Box. While this has marginal overhead, it also reduces the overhead in Recursive<T, F>. The upside to this change is also that you can very cheaply clone strategies.

• Filter is marginally faster.

Bug Fixes

• Removed impl Arbitrary for LocalKeyState since LocalKeyState no longer exists in the nightly compiler.

• Unstable features compile on latest nightly again.

Commits

• 01ff1e4 Version 0.6.0.
• c9d30e8 Update unstable features for latest nightly.
• 67aae7b Reduce allocations in Filter.
• 1c8b79c Explicitly test that [pub] works in prop_compose!.
• 480674b Merge pull request #46 from Centril/feature/runner-refactor
• f118d15 fix trailing newlines"
• dee92a5 refactor test_runner.rs as a directory
• 7041fb6 Merge pull request #43 from Centril/feature/general-cleanup-1
• 0f09839 update CHANGELOG.md according to prev commit + correct breaking changes.
• b99f5ef get rid of ArcStrategy & make (S)BoxedStrategy as ArcStrategy was.
• Additional commits viewable in compare view

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[dependabot]

Looks like proptest-derive is up-to-date now, so this is no longer needed.