[MacPorts] #62450: gobject-introspection: Switch to python 3.9

[MacPorts]

#62450: gobject-introspection: Switch to python 3.9
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 Reporter:  mf2k         |      Owner:  dbevans
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  gobject-introspection
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 Now that it is the default, gobject-introspection should now depend on
 python 3.9 if supported.

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Ticket URL: <https://trac.macports.org/ticket/62450>
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