[MacPorts] #54172: py-rdflib: update to 4.2.2

[MacPorts]

#54172: py-rdflib: update to 4.2.2
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  Reporter:  petrrr     |      Owner:  eikeon@…
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  py-rdflib  |
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Comment (by mf2k):

 Home page has moved to https://github.com/RDFLib. py35 and py36 should be
 added too.

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Ticket URL: <https://trac.macports.org/ticket/54172#comment:1>
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