老师您好，我在安装generator-angular的时候遇到问题
我用的是MacBook，当我执行：
sudo npm install -g generator-angular
的时候，就会出现下面的错误提示：
npm WARN peerDependencies The peer dependency generator-karma@>=0.9.0 included from generator-angular will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.
npm WARN peerDependencies The peer dependency yo@>=1.0.0 included from generator-angular will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.
我去google了一下，有些人也碰到了和我差不多的问题，有些是uninstall 了generatro-karma，我也试了试，结果依然不行。
老师，您也碰到过类似的问题吗，您是如果解决的？
谢谢。
