isAlias = (key) => {
  if (isString(key) && key.length > 1) {
    return false;
  }

  const aliases = Object.keys(meowOpts.flags)
    .filter((k) => meowOpts.flags[k].shortFlag)
    .map((k) => meowOpts.flags[k].shortFlag);

  return aliases.includes(key);
}
Check if key is an alias
@param {string} key Key to check
@returns {boolean} True for alias