Reactでgoogle calendarをうまく表示できない

前提・実現したいこと

https://crashspringfield.github.io/react-google-calendar/
このサイトを参考にreactでgoogle calendarを表示したいと考えています。
しかし、実行時に以下のようなエラーが発生しました。
momentの扱いがよくわかりません。
わかる方がいましたらコメントお願いします。

発生している問題・エラーメッセージ

TypeError: Cannot read property 'momentLocalizer' of undefined

該当のソースコード

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _react = _interopRequireWildcard(require("react"));

var _reactBigCalendar = _interopRequireDefault(require("react-big-calendar"));

var _moment = _interopRequireDefault(require("moment"));

require("react-big-calendar/lib/css/react-big-calendar.css");

var _googleAPI = _interopRequireDefault(require("./utils/googleAPI"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var localizer = _reactBigCalendar.default.momentLocalizer(_moment.default);  ////////該当部分

var Calendar =
  /*#__PURE__*/
  function (_Component) {
    _inherits(Calendar, _Component);

    function Calendar(props) {
      var _this;

      _classCallCheck(this, Calendar);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(Calendar).call(this, props));

      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), "componentDidMount", function () {
        if (_this.props.config) {
          _this.getGoogleCalendarEvents();
        } else {
          console.log("React Google Calendar requires you pass a configuration object");
        }
      });

      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), "getGoogleCalendarEvents", function () {
        _googleAPI.default.getAllCalendars(_this.props.config).then(function (events) {
          _this.setState({
            events: events
          });
        }).catch(function (err) {
          throw new Error(err);
        });
      });

      _defineProperty(_assertThisInitialized(_assertThisInitialized(_this)), "render", function () {
        return _react.default.createElement("div", null, _react.default.createElement(_reactBigCalendar.default, {
          localizer: localizer,
          events: _this.state.events,
          style: {
            height: "100vh"
          }
        }));
      });

      _this.state = {
        events: []
      };
      return _this;
    }

    return Calendar;
  }(_react.Component);

exports.default = Calendar;

import Calendar from 'react_google_calendar';
import React from 'react';

const calendar_configuration = {
  api_key: 'hogehoge',
  calendars: [
    {
      name: 'shift',
      url: 'https://calendar.google.com/calendar/embed?hogehoge'
    }
  ],
  dailyRecurrence: 700,
  weeklyRecurrence: 500,
  monthlyRecurrence: 20
}

export default class GoogleCalendar extends React.Component {
  constructor(props) {
    super(props)
    this.state = {
      events: []
    }
  }

  render = () =>
    <div>
      <Calendar
        events={this.state.events}
        config={calendar_configuration} />
    </div>
}