Update secp256k1 requirement from 0.21 to 0.24

[dependabot[bot]]

Updates the requirements on secp256k1 to permit the latest version.

Changelog

Sourced from secp256k1's changelog.

0.24.0 - 2022-07-20

• Upgrade to new release of bitcoin_hashes.

0.23.4 - 2022-07-14

• Disable automatic rerandomization of contexts under WASM

0.23.3 - 2022-06-29

• Add must_use for mut self key manipulation methods
• Fix fuzzing feature guard

0.23.2 - 2022-06-27

• Move cbor to dev-dependencies
• Derive Hash for RecoverableSignature

0.23.1 - 2022-06-24

Enable "rand/std_rng" feature when the crate's "rnd-std" feature is enabled.

0.23.0 - 2022-06-21

The major change in this version is the increase of the Minimum Supported Rust Version (MSRV) from 1.29 to 1.41.1, this is a big change because it introduces Rust Edition 2018 to the codebase along with all the benefits that brings.

Breaking changes

• MSRV bumped to 1.41.1 and edition changed to 2018
• serde implements serialize fixed-width arrays as tuples in binary formats to avoid encoding the length
• Key tweaking methods renamed and refactored to use a more functional-style, they now accept a new Scalar type instead of raw slices
• Update rand dependency to 0.8
• KeyPair::from_secret_key borrows SecretKey instead of taking ownership
• SerializedSignature no longer implements Default

New features/APIs

• Several convenience/conversion methods between keys
• sign_ecdsa_with_noncedata and sign_ecdsa_recoverable_with_noncedata can be used to add additional entropy to ECDSA signatures
• Errors now display their sources if std is unavailable, with std they rely on the consumer to use the source() method
• Implemented TryFrom for Parity
• The alloc feature can be used on targets with allocators without a standard library
• SharedSecret can be created from a slice, parsed from a hex string, or (de)serialized using serde
• SerializedSignature implements IntoIterator (both owned and shared reference)
• We now derive std::hash::Hash for Signature

Other improvements

• global-context feature now activates global-context-less-secure.
• githooks/ directory added for contributors

... (truncated)

Commits

• See full diff in compare view

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[dependabot[bot]]

A newer version of secp256k1 exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.