Merge pull request #147 from zcash/pczt-verifier #193

Job	Run time
Clippy (MSRV)	1m 19s
Build target wasm32-wasi	1m 21s
Bitrot check	1m 55s
Latest build on ubuntu-latest	44s
Latest build on windows-latest	2m 49s
Intra-doc links	1m 41s
Rustfmt	12s
Latest build on macOS-latest	48s
Test on ubuntu-latest	2m 47s
Test on windows-latest	4m 33s
Test on macOS-latest	2m 18s
	20m 27s

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