OrchardZSA backward compatability using traits #463

Job	Run time
Test on ubuntu-latest	10m 28s
Bitrot check	1m 34s
Test on windows-latest	13m 46s
Book tests	1m 40s
Test on macOS-latest	18m 41s
Build target wasm32-unknown-unknown	2m 6s
Test on ubuntu-latest with beta features	10m 44s
Test on windows-latest with beta features	14m 51s
Intra-doc links	1m 52s
Build target wasm32-wasi	2m 1s
Test on macOS-latest with beta features	8m 58s
Test on i686-unknown-linux-gnu	22m 35s
Test on ubuntu-latest with nightly features	10m 56s
Test on i686-unknown-linux-gnu with beta features	22m 42s
Test on windows-latest with nightly features	14m 54s
Test on macOS-latest with nightly features	9m 19s
Test on i686-unknown-linux-gnu with nightly features	23m 21s
Rustfmt	16s
	3h 10m 44s

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