版本：1.0.3
- https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.js
- https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.min.js
- https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.require.js
- https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.require.min.js