Bump snafu from 0.9.0 to 0.9.1

Bumps [snafu](https://github.com/shepmaster/snafu) from 0.9.0 to 0.9.1.
- [Changelog](https://github.com/shepmaster/snafu/blob/main/CHANGELOG.md)
- [Commits](shepmaster/snafu@0.9.0...0.9.1)

---
updated-dependencies:
- dependency-name: snafu
  dependency-version: 0.9.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]