message: Add: ethers wallet `SigningKey` method mock
diff: @@ -61,9 +61,14 @@ export const HDNode = {
  }),
  };
  +export const SigningKey = {
  + publicKeyToAddress: jest.fn(buffer => buffer.toString()),
  +};
  +
  const ethersWallet = {
  Wallet,
  HDNode,
  + SigningKey,
  };
  export default ethersWallet;
  