[MacPorts] #62374: sxiv: update to V26

[MacPorts]

#62374: sxiv: update to V26
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 Reporter:  Pesthauch666  |      Owner:  gnubeest
     Type:  update        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  sxiv
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 sxiv port seems rather outdated (1.3.1 from November 16, 2014). Current
 version is v26 from January 2020.

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Ticket URL: <https://trac.macports.org/ticket/62374>
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