[MacPorts] #61716: py-pip update to version 20.3

[MacPorts]

#61716: py-pip update to version 20.3
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 Reporter:  usernamedefault  |      Owner:  (none)
     Type:  update           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:
 Keywords:                   |       Port:  py-pip
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 https://pypi.org/project/pip/

 Version 20.3 released 2020-11-30

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Ticket URL: <https://trac.macports.org/ticket/61716>
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