版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.css
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.js
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.js.map
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.min.css
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.min.css.map
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.min.js
- https://cdn.bootcdn.net/ajax/libs/nvd3/1.8.6/nv.d3.min.js.map