[MacPorts] #36343: Update Gwyddion to version 2.30

[MacPorts]

#36343: Update Gwyddion to version 2.30
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  Reporter:  feranick@…  |      Owner:  rowue@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.1.2
Resolution:              |   Keywords:
      Port:  gwyddion    |
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Comment (by rowue@…):

 Fixed by r98779

 I'm unable to test, so please give feedback if everything works as
 expected.

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Ticket URL: <https://trac.macports.org/ticket/36343#comment:2>
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