版本：4.2.1
- https://cdn.bootcdn.net/ajax/libs/exceljs/4.2.1/exceljs.bare.js
- https://cdn.bootcdn.net/ajax/libs/exceljs/4.2.1/exceljs.bare.min.js
- https://cdn.bootcdn.net/ajax/libs/exceljs/4.2.1/exceljs.js
- https://cdn.bootcdn.net/ajax/libs/exceljs/4.2.1/exceljs.min.js