cdn 示例 https://cdn.jsdelivr.net/gh/账号/仓库/index.js https://cdn.jsdelivr.net/gh/账号/仓库@版本/index.js 带版本号 https://cdn.jsdelivr.net/gh/amwu/cdn@0.1/index.js 不带版本号 https://cdn.jsdelivr.net/gh/amwu/cdn/index.html