[MacPorts] #57823: py-qtpy: allow py-pyside2 instead of py-pyqt5

[MacPorts]

#57823: py-qtpy: allow py-pyside2 instead of py-pyqt5
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  Reporter:  chrstphrchvz                        |      Owner:  eborisch
      Type:  enhancement                         |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  py-qtpy py-pyqt5 py-pyside2 py-     |
  spyder py-spyder-devel                         |
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Comment (by reneeotten):

 A while back I opened a [https://github.com/macports/macports-
 ports/pull/2615 PR2615] to add variants for the different backends.
 Admittedly, there were some issues with my suggested changes in that PR,
 but the idea of adding variants was not met with much enthusiasm. I am not
 against looking at this again, but I am not sure whether @eborisch has
 changed his opinion on this (at least the comments in the abovementioned
 PR should be kept in mind).

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Ticket URL: <https://trac.macports.org/ticket/57823#comment:2>
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