Tests

feat: adjust gas-costs for EIP-2935 BLOCKHASH #3420

Job	Run time
check no-default-features	18s
check serde	21s
check std	16s
test stable --no-default-features	57s
test stable	1m 16s
test no_std	28s
test stable --all-features	1m 31s
test beta --no-default-features	1m 0s
clippy	1m 14s
test beta	58s
test beta --all-features	1m 22s
docs	1m 5s
test nightly --no-default-features	2m 19s
test nightly	2m 26s
test nightly --all-features	2m 33s
fmt	8s
	18m 12s

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