reactnative-Cannot-get-property-packageName-on-null-object

react-native打包安卓apk的时候，报错Cannot get property ‘packageName’ on null object
完全没有头绪，研究了半天才发现竟然是因为package.json里面scripts自定了命令导致的
无法理解为何会影响安卓打包并且报错packageName null
还好找到原因了

"scripts": {
    "start": "react-native start",
    "dev": "react-native ***",
    "test": "jest",
    "lint": "eslint ."
  },

文中的”dev”: “react-native *“, 为自定了命令，会导致这个错误，删除即可