[MacPorts] #53766: update pymol to 1.8.6.0 release

[MacPorts]

#53766: update pymol to 1.8.6.0 release
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 Reporter:  jwhowarth  |      Owner:
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:             |       Port:  pymol
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 The attached Portfile.diff updates the pymol port to the 1.8.6.0 release
 and adds the new port dependency on msgpack1.

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Ticket URL: <https://trac.macports.org/ticket/53766>
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