Encoding relations API #163

Job	Run time
Build and test (Windows) (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 33s
Check docs	29s
Build and test (Windows) (windows-latest, stable, none, x86_64-pc-windows-msvc)	2m 18s
Chec fmt	6s
Build and test (ubuntu-latest, stable, none)	16s
Check clippy	33s
Build and test (cross) (i686-unknown-linux-gnu)	46s
Build and test (ubuntu-latest, stable, default)	20s
Run fuzz tests (ubuntu-latest, nightly)	28s
Build and test (cross) (aarch64-unknown-linux-gnu)	38s
Build and test (macOS-latest, stable, none)	19s
Build and test (cross) (armv7-linux-androideabi@23)	1m 50s
Build and test (macOS-latest, stable, default)	25s
Build and test (cross) (aarch64-linux-android@23)	1m 33s
	11m 34s

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