refactor: use simple boolean for parity in signature (#776) #2114

Job	Run time
docs	53s
clippy	1m 7s
check no_std	51s
features stable	2m 20s
features stable --all-targets	3m 22s
fmt	12s
miri --no-default-features	5m 6s
features nightly	2m 37s
miri	5m 19s
features nightly --all-targets	3m 37s
miri --all-features	7m 51s
test ubuntu-latest stable --no-default-features	1m 17s
wasm	43s
test ubuntu-latest stable	1m 12s
test ubuntu-latest nightly --no-default-features	1m 20s
test ubuntu-latest nightly	1m 16s
test ubuntu-latest 1.81 --no-default-features	39s
test ubuntu-latest 1.81	47s
test windows-latest stable --no-default-features	4m 3s
test windows-latest stable	4m 5s
test windows-latest nightly --no-default-features	3m 19s
test windows-latest nightly	2m 54s
test windows-latest 1.81 --no-default-features	1m 47s
test windows-latest 1.81	1m 20s
test ubuntu-latest 1.81 --features json	42s
test windows-latest 1.81 --features json	1m 24s
test ubuntu-latest nightly --all-features	1m 26s
test windows-latest nightly --all-features	3m 53s
	1h 5m 22s

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