[MacPorts] #65279: py39-cryptography fails to build: no module 'typing_extensions'

[MacPorts]

#65279: py39-cryptography fails to build: no module 'typing_extensions'
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  Reporter:  breiter          |      Owner:  stromnov
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.7.2
Resolution:                   |   Keywords:
      Port:  py-cryptography  |
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Comment (by reneeotten):

 see https://github.com/macports/macports-ports/pull/15044

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Ticket URL: <https://trac.macports.org/ticket/65279#comment:3>
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