aliases(aliases) {
    // Getter for the array of aliases is the main reason for having aliases() in addition to alias().
    if (aliases === undefined) return this._aliases;

    aliases.forEach((alias) => this.alias(alias));
    return this;
  }
Set aliases for the command.

Only the first alias is shown in the auto-generated help.

@param {string[]} [aliases]
@return {(string[]|Command)}