Bump ripemd from 0.1.0 to 0.1.1 (paritytech#691)

Bumps [ripemd](https://github.com/RustCrypto/hashes) from 0.1.0 to 0.1.1.
- [Release notes](https://github.com/RustCrypto/hashes/releases)
- [Commits](RustCrypto/hashes@ripemd-v0.1.0...ripemd-v0.1.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

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