Centos7命令行安装新版Node

#更新系统sudoyum-yupdate#installcurl-sLhttps://rpm.nodesource.com/setup_12.x|sudobash-sudoyumcleanall&&sudoyummakecachefastsudoyuminstall-ygcc-c++makesudoyuminstall-ynodejs#验证节点-v