版本：0.1.0
- https://cdn.bootcdn.net/ajax/libs/flag-icon-css/0.1.0/css/flag-icon-css.css
- https://cdn.bootcdn.net/ajax/libs/flag-icon-css/0.1.0/css/flag-icon-css.min.css
:flags: A collection of all country flags in SVG — plus the CSS for easier integration