chore(deps) Update Rust crate clap to 3.0.0-beta.4 (#2478)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

tooling/cli.rs/Cargo.toml

@@ -17,7 +17,7 @@ name = "cargo-tauri"
 path = "src/main.rs"
 
 [dependencies]
-clap = { version = "3.0.0-beta.2", features = [ "yaml" ] }
+clap = { version = "3.0.0-beta.4", features = [ "yaml" ] }
 anyhow = "1.0"
 tauri-bundler = { version = "1.0.0-beta.4", path = "../bundler" }
 colored = "2.0"