build(deps): bump unicode-width from 0.1.7 to 0.1.8

Bumps [unicode-width](https://github.com/unicode-rs/unicode-width) from 0.1.7 to 0.1.8.
- [Release notes](https://github.com/unicode-rs/unicode-width/releases)
- [Commits](https://github.com/unicode-rs/unicode-width/commits/v0.1.8)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>