Rust

Implement BLS12-381 `contracttype` support #4660

Job	Run time
check-git-rev-deps	13s
build-fuzz	1m 13s
cargo-deny (advisories)	40s
cargo-deny (bans licenses sources)	35s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 48s
docs	1m 48s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	1m 47s
fmt	17s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	1m 40s
migration-docs	22s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	1m 48s
publish-dry-run	0s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	1m 48s
readme	1m 8s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	1m 41s
semver-checks	1m 47s
complete	1s
	18m 36s

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