版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/bs-custom-file-input/1.3.4/bs-custom-file-input.js
- https://cdn.bootcdn.net/ajax/libs/bs-custom-file-input/1.3.4/bs-custom-file-input.js.map
- https://cdn.bootcdn.net/ajax/libs/bs-custom-file-input/1.3.4/bs-custom-file-input.min.js
- https://cdn.bootcdn.net/ajax/libs/bs-custom-file-input/1.3.4/bs-custom-file-input.min.js.map