Generate wheels for all platforms via cibuildwheel

**What**

Use https://github.com/pypa/cibuildwheel/ to build wheels for major platforms.

**Why**

This would make it easier to install and use this project, when you're not on a Linux machine and trying to fuzz Python code.

In my case, I'm trying to fuzz the piece of code that serves a a foundational piece of the Python packaging ecosystem (like parsing requirements within pip): https://github.com/pypa/packaging/. I'd like for MacOS/Linux wheels that cover all the supported Python versions. :)