版本：4.0.6
- https://g.omtech.cn/select2/4.0.6/select2.css
- https://g.omtech.cn/select2/4.0.6/select2.full.js
版本：4.0.2
- https://g.omtech.cn/select2/4.0.2/select2.js
- https://g.omtech.cn/select2/4.0.2/select2.css
- https://g.omtech.cn/select2/4.0.2/select2.full.js
- https://g.omtech.cn/select2/4.0.2/i18n/zh-CN.js
- https://g.omtech.cn/select2/4.0.2/i18n/en.js