Summary:
**Motivation**
If the project is using yarn to manage its dependencies, we should be running 'yarn add' to upgrade the React Native dependency, rather than 'npm install'.
**Test plan (required)**
Running in a project that's in a bad state:
Error: react-native version in "package.json" (0.29.2) doesn't match the installed version in "node_modules" (0.38.0).
Try running "yarn" to fix this.
Removed yarn.lock file, ran again:
Error: react-native version in "package.json" (0.29.2) doesn't match the installed version in "node_modules" (0.38.0).
Try running "npm install" to fix this.
Running inside a folder that doesn't contain a `package.json` file:
Error: Unable to find "/Users/mkonicek/Zero29App/package.json" or "/Users/mkonicek/Zero29App/node_modules/react-native/package.json". Make sure you ran "yarn" and that you are inside a React Native project.
Removed yarn.lock file, ran again:
Error: Unable to find "/Users/mkonicek/Zero29App/package.json" or "/Users/
Closes https://github.com/facebook/react-native/pull/11225
Differential Revision: D4261102
Pulled By: mkonicek
fbshipit-source-id: b44ae91fe46f2c81b14616ca2868cc171692c895
Eli White
Martin Konicek