版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/kontra/9.0.0/kontra.d.ts
- https://cdn.bootcdn.net/ajax/libs/kontra/9.0.0/kontra.js
- https://cdn.bootcdn.net/ajax/libs/kontra/9.0.0/kontra.min.js
- https://cdn.bootcdn.net/ajax/libs/kontra/9.0.0/kontra.min.mjs
- https://cdn.bootcdn.net/ajax/libs/kontra/9.0.0/kontra.mjs