rfc6979 0.3.1

Pure Rust implementation of RFC6979: Deterministic Usage of the Digital Signature Algorithm (DSA) and Elliptic Curve Digital Signature Algorithm (ECDSA)
Documentation
# Changelog
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## 0.3.1 (2022-11-03)
### Added
- Usage example ([#577])

[#577]: https://github.com/RustCrypto/signatures/pull/577

## 0.3.0 (2022-06-26)
### Changed
- Use `SimpleHmac` to implement `HmacDrbg` ([#499])

[#499]: https://github.com/RustCrypto/signatures/pull/499

## 0.2.0 (2022-05-08)
### Added
- License files ([#447])

### Changed
- Bump `hmac` dependency to v0.12 ([#433])
- Bump `crypto-bigint` dependency to v0.4 ([#469])

[#433]: https://github.com/RustCrypto/signatures/pull/433
[#447]: https://github.com/RustCrypto/signatures/pull/447
[#469]: https://github.com/RustCrypto/signatures/pull/469

### 0.1.0 (2021-11-21)
- Initial release