Rust

Integrate deserialize_yaml() from dist. #701

Job	Run time
check	24s
fmt	7s
clippy	26s
docs	21s
os-test (ubuntu-latest)	47s
os-test (ubuntu-latest, --no-default-features)	32s
os-test (ubuntu-latest, --all-features)	1m 2s
os-test (windows-latest)	2m 41s
os-test (windows-latest, --no-default-features)	1m 15s
os-test (windows-latest, --all-features)	3m 4s
os-test (macOS-latest)	56s
os-test (macOS-latest, --no-default-features)	28s
os-test (macOS-latest, --all-features)	1m 10s
feature-check	2m 58s
	16m 11s

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