feat: implement precompile contract for opBNB #9

Job	Run time
check serde	48s
clippy	1m 17s
check no-default-features	46s
check std	46s
docs	1m 18s
fmt	7s
test stable --no-default-features	2m 42s
test stable	2m 38s
test stable --all-features	2m 58s
test beta --no-default-features	2m 29s
test beta	2m 36s
test beta --all-features	2m 39s
test nightly --no-default-features	2m 31s
test nightly	2m 35s
test nightly --all-features	2m 51s
	29m 1s

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