Rust

Merge pull request #490 from liamwhite/lazy #1103

Job	Run time
build_bin_spec (nightly)	1m 7s
build_lib_test (nightly)	59s
build_bin_spec (beta)	1m 12s
build_lib_test (beta)	1m 20s
build_bin_spec (stable)	1m 3s
build_lib_test (stable)	1m 18s
build_bin_spec ($MSRV)	3m 4s
build_lib_test ($MSRV)	3m 33s
clippy_format	2m 30s
build_wasm (nightly)	49s
build_wasm (beta)	52s
lockfile	1m 2s
build_wasm (stable)	45s
no_features_build_test (nightly)	30s
build_wasm ($MSRV)	3m 3s
no_features_build_test (beta)	30s
no_features_build_test (stable)	30s
no_features_build_test ($MSRV)	2m 24s
	26m 31s

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