背景和实操
比如在ReactNative中，安装完依赖之后，需要改端口、删掉某些文件….
多个操作不能在package.json中定义数组，但可以重新定义一个脚本，在脚本中定义操作集合：
shell中这么写就行
#!/bin/bash
echo 'Now run custom commands after all package is installed.'
echo 'modify react-native package-manager default port'
react-native-port-patcher --new-port 9090
echo 'fix `Font Awesome` could not be found within the package etc.'
rm ./node_modules/react-native/local-cli/core/__fixtures__/files/package.json