[MacPorts] #48107: py-visa @1.4 update to 1.8

[MacPorts]

#48107: py-visa @1.4 update to 1.8
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  Reporter:  joshuacookebarnes@…  |      Owner:  macports-tickets@…
      Type:  update               |     Status:  new
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:
Resolution:                       |   Keywords:  haspatch
      Port:  py-visa              |
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Comment (by petr@…):

 BTW: If we discontinue the py26 subport, shouldn't it be graveyarded?

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Ticket URL: <https://trac.macports.org/ticket/48107#comment:9>
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