[MacPorts] #45341: py-game: add py33 and py34 subports

[MacPorts]

#45341: py-game: add py33 and py34 subports
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  Reporter:  petr@…       |      Owner:  jmr@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  py-game      |
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Comment (by petr@…):

 `py-game` currently enables the `py32` subport. If there is no Py3
 compatibility, I doubt this is useful.

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Ticket URL: <https://trac.macports.org/ticket/45341#comment:2>
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