[MacPorts] #39641: py-pyro: update to 4.20

[MacPorts]

#39641: py-pyro: update to 4.20
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 Reporter:  jmr@…   |      Owner:  sean@…
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-pyro
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 Released 2013-06-09: https://pypi.python.org/pypi/Pyro4/

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Ticket URL: <https://trac.macports.org/ticket/39641>
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