[MacPorts] #38149: Update Gwyddion to version 2.31

[MacPorts]

#38149: Update Gwyddion to version 2.31
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  Reporter:  feranick@…  |      Owner:  rowue@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  gwyddion    |
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Changes (by macsforever2000@…):

 * cc: yeti@… (added)
 * keywords:  gwyddion =>
 * version:  2.1.3 =>
 * owner:  macports-tickets@… => rowue@…


Comment:

 In the future, please use WikiFormatting and Cc the port maintainer(s).

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Ticket URL: <https://trac.macports.org/ticket/38149#comment:1>
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