[MacPorts] #60887: certbot: Use python38 by default

[MacPorts]

#60887: certbot: Use python38 by default
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  Reporter:  ryandesign   |      Owner:  Schamschula
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  certbot      |
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Comment (by Schamschula):

 Updated to make python 3.8 default: https://github.com/macports/macports-
 ports/commit/5356ad3f1c8662f20287fa969bfc054505799cf3

 As far as the two blocks, I'll have to do some experimentation to merge
 them into one. I recall that there was a reason for this order, i.e. not
 declaring the variants before the depends_lib block. Variants are usually
 declared towards the bottom of the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/60887#comment:1>
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