refactor: use simple boolean for parity in signature #2110

Job	Run time
check no_std	52s
features stable	2m 7s
clippy	47s
docs	34s
features stable --all-targets	3m 21s
features nightly	1m 30s
fmt	12s
features nightly --all-targets	2m 43s
miri --no-default-features	4m 51s
wasm	42s
miri	4m 38s
test ubuntu-latest stable --no-default-features	1m 15s
miri --all-features	7m 13s
test ubuntu-latest stable	1m 19s
test ubuntu-latest nightly --no-default-features	49s
test ubuntu-latest nightly	47s
test ubuntu-latest 1.81 --no-default-features	39s
test ubuntu-latest 1.81	37s
test windows-latest stable --no-default-features	2m 59s
test windows-latest stable	3m 19s
test windows-latest nightly --no-default-features	1m 59s
test windows-latest nightly	1m 38s
test windows-latest 1.81 --no-default-features	1m 37s
test windows-latest 1.81	2m 13s
test ubuntu-latest 1.81 --features json	41s
test windows-latest 1.81 --features json	1m 21s
test ubuntu-latest nightly --all-features	1m 6s
test windows-latest nightly --all-features	2m 21s
	54m 10s

Provide feedback