[MacPorts] #56139: update to pymol 2.1.0 with PyQt interface support

[MacPorts]

#56139: update to pymol 2.1.0 with PyQt interface support
------------------------+---------------------------------
  Reporter:  jwhowarth  |      Owner:  (none)
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  haspatch maintainer
      Port:  pymol      |
------------------------+---------------------------------

Comment (by jwhowarth):

 FYI, I added the pmg_tk_platform.patch to track the behavior of the linux
 build on Darwin as closely as possible as upstream really only tests the
 open source builds on linux AFAIK. So are we okay for the commit now?

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Ticket URL: <https://trac.macports.org/ticket/56139#comment:21>
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