build(deps): bump hkdf from 0.12.0 to 0.12.2 (#94)

build(deps): bump hkdf from 0.12.0 to 0.12.2 (#94)

Bumps [hkdf](https://github.com/RustCrypto/KDFs) from 0.12.0 to 0.12.2.
- [Release notes](https://github.com/RustCrypto/KDFs/releases)
- [Commits](https://github.com/RustCrypto/KDFs/compare/hkdf-v0.12.0...hkdf-v0.12.2)

---
updated-dependencies:
- dependency-name: hkdf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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