pmap: implemented rc options #1757

Job	Run time
cargo test (macOS-latest)	1m 9s
cargo check (windows-latest)	2m 41s
cargo test (windows-latest)	2m 35s
cargo test (ubuntu-latest)	1m 7s
cargo check (ubuntu-latest)	48s
cargo check (macOS-latest)	37s
Test each util separately (windows-latest)	3m 25s
Test each util separately (macOS-latest)	1m 3s
Test each util separately (ubuntu-latest)	1m 10s
Code Coverage (macos-latest, macos)	2m 0s
Code Coverage (ubuntu-latest, unix)	2m 10s
Code Coverage (windows-latest, windows)	5m 1s
	23m 46s

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