chore(deps): update rust crate clap_mangen to v0.2.30 #1510

Job	Run time
cargo test (windows-latest)	2m 58s
cargo test (ubuntu-latest)	1m 6s
cargo check (ubuntu-latest)	59s
cargo check (windows-latest)	2m 7s
cargo check (macOS-latest)	36s
cargo test (macOS-latest)	52s
cargo clippy -- -D warnings (ubuntu-latest)	1m 7s
cargo fmt --all -- --check	36s
cargo clippy -- -D warnings (windows-latest)	2m 22s
cargo clippy -- -D warnings (macOS-latest)	49s
Code Coverage (windows-latest, windows)	5m 22s
Code Coverage (ubuntu-latest, unix)	2m 25s
Code Coverage (macos-latest, macos)	3m 18s
	24m 37s

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