Bump zeroize from 1.6.0 to 1.7.0 (#95)

Bumps [zeroize](https://github.com/RustCrypto/utils) from 1.6.0 to 1.7.0.
- [Commits](https://github.com/RustCrypto/utils/commits)

---
updated-dependencies:
- dependency-name: zeroize
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>