Bump fixed-hash

Bumps [fixed-hash](https://github.com/paritytech/parity-common) from `d3a9327` to registry+https://github.com/rust-lang/crates.io-index.
- [Commits](https://github.com/paritytech/parity-common/commits)

---
updated-dependencies:
- dependency-name: fixed-hash
  dependency-type: direct:production
...

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