code: function createNext(question) {
    if (!question.options.next) return;
  
    if (typeof question.options.next === 'function') {
      question.next = function() {
        question.options.next.apply(question, arguments);
      };
      return;
    }
  
    if (typeof question.options.next === 'string') {
      question.type = 'confirm';
      question.next = function(answer, questions, answers, next) {
        if (answer === true) {
          questions.ask(question.options.next, next);
        } else {
          next(null, answers);
        }
      };
    }
  }
docs: Create the next question to ask, if `next` is passed on the
  options.
  
  @param {Object} `app` question instance