Feature idea: serialize from required CJS modules

Hi Blake,

I have a feature idea: serializing cross-file. Even with the `references` option enabled, requires/imports evaluate to their references (not the fully-serialized data).

Worse comes to worse, one could just bundle their code and then execute this lib's `stringify` fn. Although, ideally, this build step could go away.

[Here's a simple example](https://github.com/harrysolovay/javascript-stringify-issue-repro) of where this might come in handy.

Identifying the difference between node & browser environments seems to be a reason not to implement this... although I'm sure there're good workarounds.

Anyways, please let me know your thoughts on this. Would love to discuss implementations & work on a PR :)

从链接的复现开始，检查库的 stringify 函数以及针对所需 CommonJS 模块的 references 选项。比较 Node 和浏览器环境中的行为，然后在实现之前就预期的跨文件序列化行为达成一致；该 issue 未指明任何文件或测试，因此完成标准仍未确定。

由索引模型根据 Issue 内容生成。