[MacPorts] #60876: Upgrade GIMP2 port to GIMP 2.10.20

[MacPorts]

#60876: Upgrade GIMP2 port to GIMP 2.10.20
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  Reporter:  jacbou  |      Owner:  dbevans
      Type:  update  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  gimp2   |
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Comment (by mascguy):

 Is there anything I can do to help with this?

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Ticket URL: <https://trac.macports.org/ticket/60876#comment:3>
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