[MacPorts] #68587: pg github: create new 1.1 version

[MacPorts]

#68587: pg github: create new 1.1 version
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  Reporter:  jasonliu--   |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.8.1
Resolution:               |   Keywords:  portgroup
      Port:  pg-github    |
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Comment (by breun):

 I don't know if there is a particular versioning scheme for PortGroups,
 but I prefer semantic versioning in general, and under that scheme a
 backwards incompatible change would require bumping the major version.

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Ticket URL: <https://trac.macports.org/ticket/68587#comment:2>
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