Bump argh from 0.1.12 to 0.1.13

Bumps [argh](https://github.com/google/argh) from 0.1.12 to 0.1.13.
- [Release notes](https://github.com/google/argh/releases)
- [Commits](google/argh@0.1.12...0.1.13)

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

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