OrchardZSA backward compatability using traits #489

Job	Run time
Bitrot check	1m 47s
Book tests	2m 1s
Build target wasm32-unknown-unknown	2m 21s
Build target wasm32-wasi	2m 14s
Intra-doc links	2m 12s
Rustfmt	18s
Test on i686-unknown-linux-gnu	21m 33s
Test on ubuntu-latest	10m 39s
Test on i686-unknown-linux-gnu with beta features	20m 52s
Test on windows-latest	13m 53s
Test on i686-unknown-linux-gnu with nightly features	23m 16s
Test on macOS-latest	9m 27s
Test on ubuntu-latest with beta features	10m 56s
Test on windows-latest with beta features	14m 36s
Test on macOS-latest with beta features	9m 24s
Test on ubuntu-latest with nightly features	10m 54s
Test on windows-latest with nightly features	14m 11s
Test on macOS-latest with nightly features	9m 54s
	3h 0m 28s

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