fix(serde): add alias `v` for `yParity` #2148

Job	Run time
clippy	58s
docs	40s
check no_std	55s
features stable	2m 14s
features stable --all-targets	3m 23s
fmt	13s
miri --no-default-features	3m 16s
features nightly	2m 10s
test ubuntu-latest stable --no-default-features	1m 7s
miri	3m 35s
features nightly --all-targets	3m 14s
wasm	41s
test ubuntu-latest stable	51s
miri --all-features	5m 24s
test ubuntu-latest nightly --no-default-features	58s
test ubuntu-latest nightly	59s
test ubuntu-latest 1.79 --no-default-features	41s
test ubuntu-latest 1.79	35s
test windows-latest stable --no-default-features	2m 54s
test windows-latest stable	2m 55s
test windows-latest nightly --no-default-features	2m 9s
test windows-latest nightly	2m 9s
test windows-latest 1.79 --no-default-features	1m 15s
test windows-latest 1.79	1m 44s
test ubuntu-latest 1.79 --features json	42s
test windows-latest 1.79 --features json	1m 33s
test ubuntu-latest nightly --all-features	1m 7s
test windows-latest nightly --all-features	2m 32s
ci success	2s
	50m 56s

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