[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 mf2k@…):

 @khindenburg: Please commit your patch. No point in keeping this port at
 such an old version. The [http://www.ni.com/download/ni-
 visa-14.0.2/5075/en/ OS X VISA driver from National Instruments] appears
 to be 64-bit now.

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Ticket URL: <https://trac.macports.org/ticket/48107#comment:11>
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