版本：2.3.1
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.3.1/countUp.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.3.1/countUp.min.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.3.1/countUp.umd.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.3.1/countUp.umd.min.js
- https://cdn.bootcdn.net/ajax/libs/countup.js/2.3.1/countUp.withPolyfill.min.js