Update clap requirement from 3.1 to 4.0

Updates the requirements on [clap](https://github.com/clap-rs/clap) to permit the latest version.
- [Release notes](https://github.com/clap-rs/clap/releases)
- [Changelog](https://github.com/clap-rs/clap/blob/master/CHANGELOG.md)
- [Commits](clap-rs/clap@clap_complete-v3.1.0...v4.0.2)

---
updated-dependencies:
- dependency-name: clap
  dependency-type: direct:production
...

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

Cargo.toml

@@ -31,7 +31,7 @@ optional = true
 version = "0.12.0"
 
 [dev-dependencies]
-clap = { version = "3.1", features = ["derive"] }
+clap = { version = "4.0", features = ["derive"] }
 diff = "0.1.11"
 
 [features]