Node.js 如何在zsh中抑制来自npm/nvm的弃用警告？

我正在使用

nvm

管理节点版本。我已经通过安装将其作为zsh的插件。我已经安装了两个版本的node-v6.1.0和v.0.10.42。因为我正在处理一个使用后一个的项目，所以我将它设置为默认值。现在，每次打开终端窗口时，都会收到以下警告：

npm WARN deprecated This version of npm lacks support for important features,
npm WARN deprecated such as scoped packages, offered by the primary npm
npm WARN deprecated registry. Consider upgrading to at least npm@2, if not the
npm WARN deprecated latest stable version. To upgrade to npm@2, run:
npm WARN deprecated 
npm WARN deprecated   npm -g install npm@latest-2
npm WARN deprecated 
npm WARN deprecated To upgrade to the latest stable version, run:
npm WARN deprecated 
npm WARN deprecated   npm -g install npm@latest
npm WARN deprecated 
npm WARN deprecated (Depending on how Node.js was installed on your system, you
npm WARN deprecated may need to prefix the preceding commands with `sudo`, or if
npm WARN deprecated on Windows, run them from an Administrator prompt.)
npm WARN deprecated 
npm WARN deprecated If you're running the version of npm bundled with
npm WARN deprecated Node.js 0.10 LTS, be aware that the next version of 0.10 LTS
npm WARN deprecated will be bundled with a version of npm@2, which has some small
npm WARN deprecated backwards-incompatible changes made to `npm run-script` and
npm WARN deprecated semver behavior.

---

我尝试添加一个

~/.npmrc

文件，在其中我放置了

loglevel=“error”

，但仍然收到这些警告。我想我需要在

.zshrc

文件中添加一些设置。你能告诉我哪一个吗？

据我所知，抑制这些警告（来自npm）的唯一方法是使用不发出警告的npm版本