使用react-pdf-viewer时 ， 中文不显示的问题(Warning: Error during font loading: The CMap "baseUrl" parameter must be specified, ensure that the "cMapUrl" and "cMapPacked" API parameters are provided)

报错: Warning: Error during font loading: The CMap "baseUrl" parameter must be specified, ensure that the "cMapUrl" and "cMapPacked" API parameters are provided

原因: 载入的pdf中有中文，就有可能会显示不出来或者乱码

 解决方法: 在viewer组件中添加配置项