[MacPorts] #49324: ghostscript @9.16_1: update to 9.18

[MacPorts]

#49324: ghostscript @9.16_1: update to 9.18
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  Reporter:  mschamschula@…  |      Owner:  macports-tickets@…
      Type:  update          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.3.4
Resolution:                  |   Keywords:  haspatch
      Port:  ghostscript     |
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Comment (by devans@…):

 Normally, rather than a revbump, I would update gimp2-devel and
 gimp3-devel to latest git master so you can skip these and I'll follow
 through.  I also have an update ready for goffice so I can hold off on
 that until after your update to avoid a gratuitous revbump. Otherwise, if
 your gimp2 test succeeds, go for it.  If not, let me know.  Thanks for the
 heads up.

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Ticket URL: <https://trac.macports.org/ticket/49324#comment:14>
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