src/cli/util.js/normalizeDetailedOptionMap
function normalizeDetailedOptionMap(detailedOptionMap) {
  return Object.keys(detailedOptionMap)
    .sort()
    .reduce((normalized, name) => {
      const option = detailedOptionMap[name];
      return Object.assign(normalized, {
        [name]: normalizeDetailedOption(name, option)
      });
    }, {});
}