v4.1.0

Chore

• Remove unused import
• Update actions/cache action to v4
• Update codecov/codecov-action action to v4
• Update baptiste0928/cargo-install action to v3

Ci

• Fix issue with CI lint steps

Deps

• Relax strictness of some deps to reduce renovate noise

♻️ Refactor

• Remove need for gated import

✨ Features

• Make tracing an optional dependency gated by tracing feature flag
• Iterate over trees
• Make rand and rayon optional

🐛 Bug Fixes

• Stdsimd removed from unstable, fix:fixup simd removal
• Add missing global_allocate feature definition and sort feature defs alphabetically
• Update benches to require test_utils feature. update clippy and test steps to include new test_utils feature
• Claytonwramsey bug, Fixes:#138

🧪 Testing

• Fix iter doctests and remove unused var
• Add hacky workaround to enable tests to run without having to specify --features=test_utils