Merge pull request #805 from zcash/check-in-lockfile #539

Job	Run time
Book tests	1m 48s
Build target wasm32-unknown-unknown	2m 10s
Bitrot check	1m 37s
Build target wasm32-wasi	2m 5s
Test on ubuntu-latest	1m 59s
Test on windows-latest	1m 55s
Test on i686-unknown-linux-gnu	13m 45s
Test on macOS-latest	1m 54s
Code coverage	20m 31s
Test on ubuntu-latest with beta features	1m 59s
Intra-doc links	1m 52s
Test on i686-unknown-linux-gnu with beta features	13m 24s
Test on i686-unknown-linux-gnu with nightly features	15m 29s
Rustfmt	16s
Test on windows-latest with beta features	1m 57s
Test on macOS-latest with beta features	1m 56s
Test on ubuntu-latest with nightly features	1m 59s
Test on windows-latest with nightly features	1m 57s
Test on macOS-latest with nightly features	2m 0s
	1h 30m 33s

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