版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/voca/1.4.0/voca.js
- https://cdn.bootcdn.net/ajax/libs/voca/1.4.0/voca.min.js
- https://cdn.bootcdn.net/ajax/libs/voca/1.4.0/voca.min.js.map
The ultimate JavaScript string library