Bump clap from 4.5.17 to 4.5.20 (#1983) #5935

Job	Run time
test-32bits	10m 6s
check-features	8m 59s
test-64bits	13m 7s
wasm-node-check	6m 5s
cargo-deny (bans licenses sources)	23s
cargo-spellcheck	2m 58s
check-no-std	3m 29s
check-rustdoc-links	3m 43s
clippy	45s
fmt	27s
wasm-node-versions-match	27s
all-ci	1s
	50m 30s

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