OrchardZSA backward compatability using traits #471

Job	Run time
Bitrot check	1m 29s
Book tests	1m 59s
Build target wasm32-unknown-unknown	2m 16s
Test on ubuntu-latest	11m 29s
Build target wasm32-wasi	2m 8s
Test on i686-unknown-linux-gnu	22m 12s
Test on windows-latest	13m 57s
Test on macOS-latest	8m 30s
Test on i686-unknown-linux-gnu with beta features	22m 22s
Test on ubuntu-latest with beta features	10m 45s
Test on i686-unknown-linux-gnu with nightly features	22m 7s
Test on windows-latest with beta features	14m 45s
Test on macOS-latest with beta features	10m 15s
Rustfmt	18s
Intra-doc links	1m 58s
Test on ubuntu-latest with nightly features	11m 39s
Test on windows-latest with nightly features	15m 23s
Test on macOS-latest with nightly features	10m 6s
	3h 3m 38s

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