Npm install cannot find module 'semver'

进入终端执行以下四个步骤：

• sudo rm -rf /usr/local/lib/node_modules
• sudo rm -rf ~/.npm
• brew uninstall --force node
• brew install node

如果还出现错误，进入项目目录执行：

  npm install -g react-native-cli

https://stackoverflow.com/questions/33870520/npm-install-cannot-find-module-semver