chore: use const blocks (#1522) #10

Job	Run time
check	24s
check serde	22s
check no_std	21s
check std	23s
check no_std optimism	23s
docs	1m 23s
clippy	1m 26s
test stable --no-default-features	2m 22s
test stable	2m 52s
test stable --all-features	2m 55s
test beta --no-default-features	2m 22s
fmt	6s
test beta	2m 35s
test beta --all-features	2m 43s
test nightly --no-default-features	2m 15s
test nightly	2m 27s
test nightly --all-features	2m 30s
	27m 49s

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