Update curve25519-dalek requirement from =4.0.0-rc.2 to =4.0.0-rc.3

[dependabot[bot]]

Updates the requirements on curve25519-dalek to permit the latest version.

Changelog

Sourced from curve25519-dalek's changelog.

Changelog

Entries are listed in reverse chronological order per undeprecated major series.

4.x series

4.0.0

Breaking changes

• Update the MSRV from 1.41 to 1.60
• Provide SemVer policy
• Make digest an optional feature
• Make rand_core an optional feature
• Remove std feature flag
• Remove nightly feature flag
• Automatic serial backend selection between u32 and u64 over the default u32
• Backend simd is now automatically selected over serial when a supported CPU is detected
• Backend override is now via cfg(curve25519_dalek_backend) over additive features
• Provide override to select u32 or u64 backend via cfg(curve25519_dalek_bits)
• Replace methods Scalar::{zero, one} with constants Scalar::{ZERO, ONE}
• Deprecate EdwardsPoint::hash_from_bytes and rename it EdwardsPoint::nonspec_map_to_curve
• Require including a new trait, use curve25519_dalek::traits::BasepointTable whenever using EdwardsBasepointTable or RistrettoBasepointTable
• Scalar::from_canonical_bytes now returns CtOption
• Scalar::is_canonical now returns Choice
• Remove Scalar::from_bytes_clamped and Scalar::reduce
• Deprecate and feature-gate Scalar::from_bits behind legacy_compatibility

Other changes

• Add EdwardsPoint::{mul_base, mul_base_clamped}, MontgomeryPoint::{mul_base, mul_base_clamped}, and BasepointTable::mul_base_clamped
• Add precomputed-tables feature
• Update Maintenance Policies for SemVer
• Migrate documentation to docs.rs hosted
• Fix backend documentation generation
• Fix panic when Ristretto::double_and_compress_batch receives the identity point
• Remove byteorder dependency
• Update the criterion dependency to 0.4.0
• Include README.md into crate Documentation
• Update the rand_core dependency version and the rand dev-dependency version.
• Relax the zeroize dependency to ^1
• Update the edition from 2015 to 2021

3.x series

3.2.0

... (truncated)

Commits

• 2e3212b chore: Release 4.0.0-rc.3 (#535)
• e429bde Clean up backend features and vendor curve25519_dalek_derive (#531)
• e111b5d Merge pull request #523 from koute/main_runtime_simd
• 50aa635 Fix the doc comment in packed_simd.rs
• 5028971 Pin the version of unsafe_target_feature
• 94247a7 Revert "(work-in-progress) Partially remove unsafe_target_feature"
• 618c508 Replace unwrap_u8 with into (#528)
• 6c2233b Fix the upper bound in the description of mods (#525)
• 267961b README.md: use buildstats.info crate badge (#526)
• c67e430 (work-in-progress) Partially remove unsafe_target_feature
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like curve25519-dalek is up-to-date now, so this is no longer needed.