[MacPorts] #53263: Add Python 3.6 to py-flake8

[MacPorts]

#53263: Add Python 3.6 to py-flake8
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 Reporter:  radarhere    |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.3.5
 Keywords:  haspatch     |       Port:  py-flake8
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Ticket URL: <https://trac.macports.org/ticket/53263>
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