[MacPorts] #64766: py-pyobjc: update to 8.3

[MacPorts]

#64766: py-pyobjc: update to 8.3
------------------------+-----------------------
 Reporter:  reneeotten  |      Owner:  danchr
     Type:  update      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  py-pyobjc
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 {{{
 % port livecheck py-pyobjc
 py-pyobjc seems to have been updated (port version: 7.3, new version: 8.3)
 }}}

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Ticket URL: <https://trac.macports.org/ticket/64766>
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