utils/initial-branch-utils.js
function getDependenciesFromPackageFiles (packagePaths, packageJsonContents) {
  return _.compact(_.uniqWith(_.flatten(packagePaths.map(path => {
    return _.flatten(
      ['dependencies', 'devDependencies', 'optionalDependencies'].map(type => {
        if (packageJsonContents[path]) {
          return _.map(packageJsonContents[path][type], (version, name) => ({ name, version, type }))
        }
      })
    )
  })), _.isEqual))
}
function getDependenciesFromPackageFiles (packagePaths, packageJsonContents) {
  return _.compact(_.uniqWith(_.flatten(packagePaths.map(path => {
    return _.flatten(
      ['dependencies', 'devDependencies', 'optionalDependencies'].map(type => {
        if (packageJsonContents[path]) {
          return _.map(packageJsonContents[path][type], (version, name) => ({ name, version, type }))
        }
      })
    )
  })), _.isEqual))
}
expects an array of package.json paths, returns an array of unique dependencies from those package.jsons: /*
Returns:
[{
name: '@finnpauls/dep',
version: '1.0.0',
type: 'devDependencies'
}]