const lockfile = await readLockfile('pnpm-lock.yaml')
const { versionsMap, multipleVersions } = pnpmMultiVersions(lockfile, {
  /** Ignore major version difference */
  ignoreMajor: false,
})

console.log(versionsMap)
// Map(1) {
//   "debug" => Set(2) { '3.2.7', '4.4.0' },
//   "ms" => Set(1) { '2.1.2' },
//   ...
// }

console.log(multipleVersions)
// Set(1) { 'debug' }