message: Fix typo in the ESM doc (skip ci)
diff: that enables tree-shaking for bundlers, like [rollup.js](http://rollupjs.org)
  and [webpack](https://webpack.js.org).
  -If you have tree-shaking enabled in your browser, just import functions normally:
  +If you have tree-shaking enabled in your bundler, just import functions normally:
  ```javascript
  import { format, parse } from 'date-fns'
  