Tests

fix(eip7702): Add tests and fix some bugs #3909

Job	Run time
check no_std	26s
check no_std optimism	19s
test stable --no-default-features	1m 5s
test stable	56s
clippy	1m 20s
test stable --all-features	1m 40s
docs	1m 16s
test beta --no-default-features	1m 0s
check	31s
test beta	1m 4s
fmt	12s
check serde	23s
test beta --all-features	1m 38s
check std	30s
test nightly --no-default-features	55s
test nightly	1m 38s
test nightly --all-features	1m 24s
	16m 17s

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