Tests

refactor: replace U256 with u64 in BLOCKHASH (#1505) #23

Job	Run time
docs	1m 9s
clippy	1m 6s
check	15s
fmt	7s
test stable --no-default-features	2m 31s
check serde	21s
test no_std	19s
test stable	2m 22s
check std	15s
test no_std optimism	28s
test stable --all-features	1m 34s
test beta --no-default-features	2m 34s
test beta	2m 23s
test beta --all-features	1m 35s
test nightly --no-default-features	2m 19s
test nightly	2m 26s
test nightly --all-features	1m 36s
	23m 20s

Provide feedback