[MacPorts] #70162: Upgrade LyX to 2.3.8 or 2.4.0

[MacPorts]

#70162: Upgrade LyX to 2.3.8 or 2.4.0
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  Reporter:  pmetzger  |      Owner:  kurthindenburg
      Type:  update    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  LyX       |
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Comment (by kurthindenburg):

 Well this might be an issue - I wish they'd gone all out for Qt6

 LyX can be built against Qt6 toolkit via --enable-qt6, though this is
 still considered experimental. Meanwhile Qt5 (the default) remain
 supported.

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Ticket URL: <https://trac.macports.org/ticket/70162#comment:4>
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