Shogo Sensui

Fix the license

2

To fix #103.

Add loading attribute for HTMLIframeElement

1

- Add a description of [`loading` attribuets for `` element](https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element). - Use [`'eager' | 'lazy'` instead of `string` as a type for `loading` attributes](https://html.spec.whatwg.org/#lazy-loading-attributes)

- Use [`copy()` of `fs-extra`](https://github.com/jprichardson/node-fs-extra/blob/master/docs/copy.md) - Bump standard and fix lint errors

will fix #50

- [ ] [jQuery 3](https://github.com/jquery/jquery) or drop? - [ ] [Bootstrap 4](https://github.com/twbs/bootstrap) or drop? - [ ] [jQuery UI](https://github.com/jquery/jquery-ui) or [typeahead.js](https://github.com/twitter/typeahead.js)?