lib/monorepo.js
function isDependencyIgnoredInGroups (groups, packageFilePath, dependencyName) {
  const groupName = getGroupForPackageFile(groups, packageFilePath)
  return groupName && _.includes(groups[groupName].ignore, dependencyName)
}
function isDependencyIgnoredInGroups (groups, packageFilePath, dependencyName) {
  const groupName = getGroupForPackageFile(groups, packageFilePath)
  return groupName && _.includes(groups[groupName].ignore, dependencyName)
}
Given a groups array, a package path, and a dependency name, returns whether that dep is ignored for that package in any group