message: Fix not working moment example
diff: +import moment from 'moment';
  import MomentUtils from '@date-io/moment';
  import MoreIcon from '@material-ui/icons/MoreVert';
  import React, { useState, useCallback } from 'react';
  import { IconButton, Menu, MenuItem } from '@material-ui/core';
  import { DatePicker, MuiPickersUtilsProvider } from '@material-ui/pickers';
  -
  import 'moment/locale/fr';
  import 'moment/locale/ru';
  +moment.locale('fr'); // it is required to select default locale manually
  +
  const localeMap = {
  en: 'en',
  fr: 'fr',
  @@ -24,15 +26,17 @@ function MomentLocalizationExample() {
  }, []);
  const selectLocale = useCallback(locale => {
  + moment.locale(locale);
  +
  setLocale(locale);
  setAnchorEl(null);
  }, []);
  return (
  - <MuiPickersUtilsProvider utils={MomentUtils} locale={locale}>
  + <MuiPickersUtilsProvider libInstance={moment} utils={MomentUtils} locale={locale}>
  <DatePicker
  value={selectedDate}
  - onChange={handleDateChange}
  + onChange={date => handleDateChange(date)}
  InputProps={{
  endAdornment: (
  <IconButton
  