When serializing, preserve Unicode information

[ponponon]

I want to keep the original information of the Unicode code and not serialize it to ASCII

In [2]: json.dumps({"中文":"你好"})
Out[2]: '{"\\u4e2d\\u6587": "\\u4f60\\u597d"}'

In [3]: json.dumps({"中文":"你好"},ensure_ascii=False)
Out[3]: '{"中文": "你好"}'

[Delgan]

Hi @ponponon, thanks for the Pull Request!

Unfortunately, I messed with git while trying to update your branch to add unit tests... I'm sorry. 😬

Do you mind fixing the mistake I made please?

I force-pushed latest Delgan:master to ponponon:master without including your commit. Consequently, I'm unable to re-open this PR.
If you don't git pull the changes I made, you can git push --force your local master branch again. Alternatively you can just update your branch locally and re-apply the ensure_ascii=False fix.

Otherwise, we'll need to open a new Pull Request.