[MacPorts] #58841: Update Qt5 ports to Qt 5.13

[MacPorts]

#58841: Update Qt5 ports to Qt 5.13
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  Reporter:  pmetzger  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  Qt5       |
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Comment (by MarcusCalhoun-Lopez):

 The current issue is Qt WebEngine.\\
 It
 [https://code.qt.io/cgit/qt/qtwebengine.git/tree/src/core/configure.json?h=5.13.1#n153
 requires] a more recent version than
 [https://trac.macports.org/ticket/56754 MacPorts provides].\\
 I am working on updating ICU, but it is slow going (there has already been
 [https://github.com/macports/macports-ports/pull/1653 one attempt]).\\
 Sorry for the delay.

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Ticket URL: <https://trac.macports.org/ticket/58841#comment:8>
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