[MacPorts] #69927: paraview: update to 5.12.0

[MacPorts]

#69927: paraview: update to 5.12.0
-------------------------+--------------------
  Reporter:  mohd-akram  |      Owner:  (none)
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  paraview    |
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Comment (by jjstickel):

 The paraview port is broken and is not being maintained. The last time I
 tried to get it working (a few years ago now), the build system was quite
 challenging to configure properly, and their were conflicts with the VTK
 port that need sorting out. Contributions are welcome, preferably in the
 form of a PR.

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Ticket URL: <https://trac.macports.org/ticket/69927#comment:1>
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