Bump granian from 1.6.4 to 1.7.0 (#100)

Bumps [granian](https://github.com/emmett-framework/granian) from 1.6.4 to 1.7.0.
- [Release notes](https://github.com/emmett-framework/granian/releases)
- [Commits](emmett-framework/granian@v1.6.4...v1.7.0)

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

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