react-native-git-upgrade yarn workspaces support

[sibelius]

related to this issue #16666 that was closed without a solution.

This is the error thrown:

git-upgrade info Check for updates 
git-upgrade info Using yarn 1.13.0 
git-upgrade info Read package.json files 
git-upgrade ERR! An error occurred during upgrade: 
git-upgrade ERR! Error: Cannot find "/Users/sibelius/Dev/appapp/node_modules/react-native/package.json". Make sure you ran "npm install" and that you are inside a React Native project.
    at parseJsonFile (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/cliEntry.js:73:11)
    at readPackageFiles (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/cliEntry.js:93:32)
    at Object.<anonymous> (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/cliEntry.js:240:67)
    at Generator.next (<anonymous>)
    at step (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/cliEntry.js:171:191)
    at /Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/cliEntry.js:171:361
    at tryCallOne (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/node_modules/promise/lib/core.js:37:12)
    at /Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/node_modules/promise/lib/core.js:123:15
    at flush (/Users/sibelius/.nvm/versions/node/v10.15.0/lib/node_modules/react-native-git-upgrade/node_modules/asap/raw.js:50:29)
    at process._tickCallback (internal/process/next_tick.js:61:11)

would you accept a pull request that fixes it?

[react-native-bot]

We are automatically closing this issue because it does not appear to follow any of the provided issue templates.

Please make use of the bug report template to let us know about a reproducible bug or regression in the core React Native library.

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