版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/field-kit/2.1.0/field-kit.js
- https://cdn.bootcdn.net/ajax/libs/field-kit/2.1.0/field-kit.js.map
- https://cdn.bootcdn.net/ajax/libs/field-kit/2.1.0/field-kit.min.js
- https://cdn.bootcdn.net/ajax/libs/field-kit/2.1.0/field-kit.min.js.map