Bump unicode-width from 0.1.8 to 0.1.9 (#420)

Bumps [unicode-width](https://github.com/unicode-rs/unicode-width) from 0.1.8 to 0.1.9.
- [Release notes](https://github.com/unicode-rs/unicode-width/releases)
- [Commits](unicode-rs/unicode-width@v0.1.8...v0.1.9)

---
updated-dependencies:
- dependency-name: unicode-width
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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