[NEW PORT] devel/py-maturin

Build and publish crates with pyo3, rust-cpython and cffi bindings as well
as Rust binaries as Python packages.

This project is meant as a zero configuration replacement for
setuptools-rust and milksnake. It supports building wheels for Python 3.5+
on FreeBSD and various other platforms, can upload them to PyPI and has
basic PyPy support.

WWW: https://github.com/PyO3/maturin

PR: 247666
Reviewed by: tcberner
Differential Revision: https://reviews.freebsd.org/D26960