Gets the contract address of the named contract. This method supports contracts used by the Annex Protocol.
contract(string) The name of the contract.
[network](string) Optional name of the Ethereum network. Main net and all the popular public test nets are supported.
RETURN(string) Returns the address of the contract.
console.log('aBNB Address: ', Annex.util.getAddress(Annex.aBNB));