fix(serde): add alias `v` for `yParity` #2151

Job	Run time
miri --no-default-features	4m 45s
test ubuntu-latest stable --no-default-features	1m 16s
miri	4m 48s
check no_std	50s
miri --all-features	7m 42s
test ubuntu-latest stable	1m 21s
test ubuntu-latest nightly --no-default-features	1m 0s
clippy	55s
test ubuntu-latest nightly	1m 3s
docs	43s
test ubuntu-latest 1.79 --no-default-features	39s
test ubuntu-latest 1.79	40s
features stable	2m 11s
test windows-latest stable --no-default-features	4m 0s
features stable --all-targets	3m 33s
test windows-latest stable	3m 59s
features nightly	2m 25s
test windows-latest nightly --no-default-features	2m 23s
wasm	42s
test windows-latest nightly	2m 42s
features nightly --all-targets	3m 29s
test windows-latest 1.79 --no-default-features	1m 35s
test windows-latest 1.79	1m 28s
fmt	14s
test ubuntu-latest 1.79 --features json	41s
test windows-latest 1.79 --features json	1m 19s
test ubuntu-latest nightly --all-features	1m 16s
test windows-latest nightly --all-features	3m 5s
ci success	2s
	1h 0m 46s

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