升级sass：Node Sass version 7.0.0 is incompatible with ^4.0.0 || ^5.0.0 || ^6.0.0

React 中使用sass，install时报错：

Node Sass version 7.0.0 is incompatible with ^4.0.0 || ^5.0.0 || ^6.0.0

node-sass已经废弃，升级到sass。

升级sass

升级sass，先卸载node sass。

yarn卸载node sass

yarn remove node-sass

npm 卸载node sass

npm uninstall node-sass

安装sass

yarn安装sass

yarn add -D sass

npm安装sass

npm i -D sass