Bump voluptuous from 0.15.2 to 0.16.0

Bumps [voluptuous](https://github.com/alecthomas/voluptuous) from 0.15.2 to 0.16.0.
- [Release notes](https://github.com/alecthomas/voluptuous/releases)
- [Changelog](https://github.com/alecthomas/voluptuous/blob/master/CHANGELOG.md)
- [Commits](alecthomas/voluptuous@0.15.2...0.16.0)

---
updated-dependencies:
- dependency-name: voluptuous
  dependency-version: 0.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]