[MacPorts] #39738: Update gnumeric @0.10.17 to 0.12.4

[MacPorts]

#39738: Update gnumeric @0.10.17 to 0.12.4
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  Reporter:  c.herbig@…  |      Owner:  macports-tickets@…
      Type:  update      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:  haspatch
      Port:  gnumeric    |
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Comment (by cal@…):

 `gobject-introspection` is a tool used in GNOME to generate a description
 of the C APIs available in a software. This description (stored in
 `.typelib` and `.gir` files) is the official method to access these APIs
 in a number of languages such as Python, Vala and JavaScript. Since those
 languages are getting more common in GNOME software these days, we are
 trying to build every GNOME package with introspection enabled.

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Ticket URL: <https://trac.macports.org/ticket/39738#comment:25>
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