CI for build and test

[wdv4758h]

hyperjson should have CI too, I know the most of the deails are in pyo3 or serde-json, but we still need to make sure the wrapper around them are passing the test cases.

And we can prebuilt the wheel by CI, support multiple platforms.

[mre]

Hey @wdv4758h,
you're absolutely right. Do you want to work on that and send me a pull request?

[mre]

CI support was done in #6 and subsequent commits. Thanks everyone.