版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/bootstrap-submenu/3.0.1/css/bootstrap-submenu.css
- https://cdn.bootcdn.net/ajax/libs/bootstrap-submenu/3.0.1/css/bootstrap-submenu.min.css
- https://cdn.bootcdn.net/ajax/libs/bootstrap-submenu/3.0.1/css/bootstrap-submenu.min.css.map
- https://cdn.bootcdn.net/ajax/libs/bootstrap-submenu/3.0.1/js/bootstrap-submenu.js
- https://cdn.bootcdn.net/ajax/libs/bootstrap-submenu/3.0.1/js/bootstrap-submenu.min.js