版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/bootstrap4-duallistbox/4.0.2/bootstrap-duallistbox.css
- https://cdn.bootcdn.net/ajax/libs/bootstrap4-duallistbox/4.0.2/bootstrap-duallistbox.min.css
- https://cdn.bootcdn.net/ajax/libs/bootstrap4-duallistbox/4.0.2/jquery.bootstrap-duallistbox.js
- https://cdn.bootcdn.net/ajax/libs/bootstrap4-duallistbox/4.0.2/jquery.bootstrap-duallistbox.min.js