build(deps): update crossterm requirement from 0.28 to 0.29 (#16)

Updates the requirements on [crossterm](https://github.com/crossterm-rs/crossterm) to permit the latest version.
- [Release notes](https://github.com/crossterm-rs/crossterm/releases)
- [Changelog](https://github.com/crossterm-rs/crossterm/blob/master/CHANGELOG.md)
- [Commits](crossterm-rs/crossterm@0.28...0.29)

---
updated-dependencies:
- dependency-name: crossterm
  dependency-version: 0.29.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.toml

@@ -13,7 +13,7 @@ license = "MIT"
 doctest = false
 
 [dependencies]
-crossterm = { version = "0.28", optional = true }
+crossterm = { version = "0.29", optional = true }
 termion = { version = "4.0", optional = true }
 pom = "3.4.0"
 serde = { version = "1.0", features = ["derive"] }