build(deps): bump proteus-traits from v2.1.1 to v2.1.2

Bumps [proteus-traits](https://github.com/wireapp/proteus) from v2.1.1 to v2.1.2.
- [Release notes](https://github.com/wireapp/proteus/releases)
- [Changelog](https://github.com/wireapp/proteus/blob/develop/CHANGELOG)
- [Commits](wireapp/proteus@b92dbc2...0d9a2f8)

---
updated-dependencies:
- dependency-name: proteus-traits
  dependency-version: 0d9a2f80f0e0a71ffdd57f1924bad71e2ec52001
  dependency-type: direct:production
...

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Author: dependabot[bot]