版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/countUp.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/countUp.min.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/countUp.umd.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/countUp.umd.min.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/requestAnimationFrame.polyfill.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.8.0/requestAnimationFrame.polyfill.min.js