[MacPorts] #52995: py-pygraphviz: add suports for python 3

[MacPorts]

#52995: py-pygraphviz: add suports for python 3
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  Reporter:  mojca          |      Owner:
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  py-pygraphviz  |
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Changes (by mojca):

 * cc: aric.hagberg@… (added)


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Ticket URL: <https://trac.macports.org/ticket/52995#comment:2>
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