[MacPorts] #58120: libpsl: move build dependencies to python3

[MacPorts]

#58120: libpsl: move build dependencies to python3
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  Reporter:  dmarteau  |      Owner:  (none)
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.5.4
Resolution:            |   Keywords:
      Port:  libpsl    |
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Comment (by mf2k):

 Does upstream support python 3.7?

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Ticket URL: <https://trac.macports.org/ticket/58120#comment:1>
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