feat: implement precompile contract for opBNB #20

Job	Run time
check std	43s
check no-default-features	46s
check serde	51s
clippy	1m 11s
docs	1m 29s
fmt	14s
test stable --no-default-features	1m 16s
test stable	1m 22s
test stable --all-features	1m 40s
test beta --no-default-features	1m 21s
test beta	1m 23s
test beta --all-features	1m 44s
test nightly --no-default-features	2m 31s
test nightly	2m 32s
test nightly --all-features	2m 40s
	21m 43s

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