[MacPorts] #60076: Quicksilver @1.3.1: update to 1.6.0

[MacPorts]

#60076: Quicksilver @1.3.1: update to 1.6.0
--------------------+-------------------------
 Reporter:  l2dy    |      Owner:  ryandesign
     Type:  update  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  Quicksilver
--------------------+-------------------------
 The livecheck URL https://github.qsapp.com/ appears to be outdated. Source
 code is now available from GitHub only and binaries are listed on
 https://qsapp.com/archives/.

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Ticket URL: <https://trac.macports.org/ticket/60076>
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