尝试从node v6.11.3LTS中的包重新安装npm，然后

Try to reinstall npm from the package in node v6.11.3LTS, and then

尝试更新到最新的 npm v5.4.2

try to update to the latest npm v5.4.2

npm install npm@latest -g

然后更新到最新的node v8.3.0

and then update to the latest node v8.3.0

npm install node@latest -g