[MacPorts] #37894: InsightToolkit: Update to version 4.3

[MacPorts]

#37894: InsightToolkit: Update to version 4.3
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  Reporter:  nick@…          |      Owner:  macports-tickets@…
      Type:  update          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  InsightToolkit  |
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Comment (by szhorvat):

 The latest stable release is currently 4.12.2 (Sep 2017):

 https://itk.org/ITK/resources/software.html

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Ticket URL: <https://trac.macports.org/ticket/37894#comment:9>
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