#213 Support pyproject.toml-based installation

[Matheus Tosta]

The modern development often depends on poetry for dependency management. That said, I tried to install this package using poetry and I faced the following error:

Note: This error originates from the build backend, and is likely not a problem with poetry but with rpi-gpio (0.7.1) not supporting PEP 517 builds. You can verify this by running 'pip wheel --use-pep517 "rpi-gpio (==0.7.1)"'.

Indeed, after trying pip wheel --use-pep517 RPi.GPIO I could verify the package doesn't support pyproject.oml-based installation.

All that said, I'd like to request additional support for this type of installation.