message: Add code property to IndexedTx in bcp package
diff: @@ -284,6 +284,7 @@ describe("decode", () => {
  const txsResponse: IndexedTx = {
  height: 2823,
  hash: testdata.txId,
  + code: 0,
  rawLog: '[{"msg_index":0,"success":true,"log":""}]',
  logs: [],
  tx: cosmoshub.tx,
  @@ -314,6 +315,7 @@ describe("decode", () => {
  const txsResponse: IndexedTx = {
  height: 2823,
  hash: testdata.txId,
  + code: 0,
  rawLog: '[{"msg_index":0,"success":true,"log":""}]',
  logs: [],
  tx: cosmoshub.tx,
  