切换 Yarn 镜像

官方镜像：https://registry.yarnpkg.com/

阿里云镜像：https://registry.npmmirror.com/

腾讯云镜像：https://mirrors.cloud.tencent.com/npm/

1. 查看当前镜像

yarn config get npmRegistryServer

2. 切换镜像

yarn config set npmRegistryServer  https://registry.npmmirror.com