404运行时出错npm install create-react-app或npm install -g npm@latest.
日志：
0 info it worked if it ends with ok
1 verbose cli [ 'C:\\Program Files\\nodejs\\node.exe',
1 verbose cli 'C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'install',
1 verbose cli 'create-react-app' ]
2 info using npm@5.6.0
3 info using node@v8.11.3
4 verbose npm-session 1f3eafc1b2f09e93
5 silly install loadCurrentTree
6 silly install readLocalPackageData
7 http fetch GET 404 http://registry.npmjs.org/create-react-app 66ms
8 silly fetchPackageMetaData error for create-react-app@latest 404 Not Found: create-react-app@latest
9 verbose …