[BUG] Problem building the recipe for pypylon package

[MarkusPTB]

I tried to employ grayskull to get a recipe for a pypi package called pypylon
https://pypi.org/project/pypylon/
https://github.com/basler/pypylon

I installed grayskull in my anaconda and called:

grayskull pypi pypylon

and

grayskull pypi https://github.com/basler/pypylon

both of my requests resulted in a noetwork connection error (my proxy is configured via the .condarc file).

I also tried to get the recipe using the web interface: https://www.marcelotrevisani.com/grayskull
yielding the error message "Error - pypylon
It was not possible to generate the recipe. Bad Request. Please check the package name and version if they are available on PyPI."

I had a short E-Mail conversation with Marcelo Trevisani resulting in the following conclusion:
-The network error is probably caused by me using a proxy which is not supported by grayskull yet.

-The grayskull pypi pypylon call from the web interface did not work out because this specific package has no sdist package on pypi and grayskull does not support wheel format yet.

-Marcelo Trevisani proposed that using the github repository should work, he tried it, and it threw an exception, probably it is something related to pypylons setup.py.

Best regards Markus.