Update unicode-width requirement from 0.1 to 0.2

Updates the requirements on [unicode-width](https://github.com/unicode-rs/unicode-width) to permit the latest version.
- [Commits](https://github.com/unicode-rs/unicode-width/commits)

---
updated-dependencies:
- dependency-name: unicode-width
  dependency-type: direct:production
...

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

Cargo.toml

@@ -19,7 +19,7 @@ ansi-parsing = []
 
 [dependencies]
 libc = "0.2.99"
-unicode-width = { version = "0.1", optional = true }
+unicode-width = { version = "0.2", optional = true }
 lazy_static = "1.4.0"
 
 [target.'cfg(windows)'.dependencies]