function getNpmReleases(page) {
  return octokit.rest.repos.listReleases({
    owner: 'npm',
    repo: 'cli',
    per_page: 50,
    page,
  }).then((response) => response.data.map(release => release.tag_name)
    .filter((version) => versionRegex.test(version))
    .sort(semver.compare)
  );
}
List all npm versions installed in this.repoPath
@param {function} cb A callback with (error, arrayOfVersions)
@return {*} nothing