Subject: Add python-pygraphviz.

From: Ricardo Wurmus <[email-masked]>
Date: Mon, 31 Dec 2018 14:40:02 +0100

Hi Guix,

this patch series adds python-pygraphviz.  Unfortunately, it depends on
a previous release of GraphViz due to a bug in the latest release.  We
can drop it with the next release of GraphViz.

--
Ricardo