[MacPorts] #30696: inkscape-devel: update python dependencies to 2.7

[MacPorts]

#30696: inkscape-devel: update python dependencies to 2.7
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 Reporter:  ecronin@…             |       Owner:  devans@…           
     Type:  enhancement           |      Status:  new                
 Priority:  Normal                |   Milestone:                     
Component:  ports                 |     Version:  2.0.1              
 Keywords:  haspatch              |        Port:  inkscape-devel     
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 needs new py27-xml port which I'm about to push.  Not extensively tested
 but seems to run built-in extensions still.

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Ticket URL: <https://trac.macports.org/ticket/30696>
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