message: feePayer field is made optional
diff: @@ -34,7 +34,7 @@ export function makeAuthInfoBytes(
  signers: ReadonlyArray<{ readonly pubkey: Any; readonly sequence: number }>,
  feeAmount: readonly Coin[],
  gasLimit: number,
  - feePayer: string,
  + feePayer: string | undefined,
  signMode = SignMode.SIGN_MODE_DIRECT,
  ): Uint8Array {
  const authInfo = {
  