Fixed ENS lookupAddress when the resolver isn't configured (#581).
Fixed ENS lookupAddress when the resolver isn't configured (#581).

ethers-io/ethers.js,ethers-io/ethers.js,ethers-io/ethers.js,ethers-io/ethers.js,ethers-io/ethers.js,ethers-io/ethers.js,ethers-io/ethers.js