message: cosmwasm-stargate: Use assertDefined where appropriate
diff: @@ -9,7 +9,7 @@ import {
  parseRawLog,
  SigningStargateClient,
  } from "@cosmjs/stargate";
  -import { assert, assertDefinedAndNotNull } from "@cosmjs/utils";
  +import { assert, assertDefined } from "@cosmjs/utils";
  import Long from "long";
  import { cosmwasm } from "../codec";
  @@ -395,7 +395,7 @@ describe("WasmExtension", () => {
  expect(codeId).toBeGreaterThanOrEqual(1);
  expect(codeId).toBeLessThanOrEqual(200);
  - assertDefinedAndNotNull(result.data);
  + assertDefined(result.data);
  const msgData = fromOneElementArray(result.data);
  expect(msgData.msgType).toEqual("store-code");
  expect(MsgStoreCodeResponse.decode(msgData.data!)).toEqual(
  @@ -415,7 +415,7 @@ describe("WasmExtension", () => {
  const amountAttr = logs.findAttribute(parsedLogs, "transfer", "amount");
  expect(amountAttr.value).toEqual("1234ucosm,321ustake");
  - assertDefinedAndNotNull(result.data);
  + assertDefined(result.data);
  const msgData = fromOneElementArray(result.data);
  expect(msgData.msgType).toEqual("instantiate");
  expect(MsgInstantiateContractResponse.decode(msgData.data!)).toEqual(
  @@ -441,7 +441,7 @@ describe("WasmExtension", () => {
  value: beneficiaryAddress,
  });
  - assertDefinedAndNotNull(result.data);
  + assertDefined(result.data);
  const msgData = fromOneElementArray(result.data);
  expect(msgData.msgType).toEqual("execute");
  expect(MsgExecuteContractResponse.decode(msgData.data!)).toEqual(
  