message: Fix named default exports from library index
  Fix export of themes
  Fix withThemes export in index
  Fix StyleProvider  export in index
diff: -export LoadingButton from './components/LoadingButton';
  -export Button from './components/Button';
  -export Price from './components/Price';
  +import * as themes from './themes';
  +import * as numbers from './util/numbers';
  +import * as currency from './util/currency';
  -export * as themes from './themes';
  +export { default as LoadingButton } from './components/LoadingButton';
  +export { default as Button } from './components/Button';
  +export { default as Price } from './components/Price';
  -export withStyles from './util/withStyles';
  -export StyleProvider from './util/StyleProvider';
  -export * as numbers from './util/numbers';
  -export * as currencies from './util/currency';
  +export { themes, numbers, currency };
  +
  +export { default as withStyles } from './util/withStyles';
  +export { default as StyleProvider } from './util/StyleProvider';
  