[MacPorts] #64493: py-cvxopt 1.2.5: Upgrade cvxopt version to 1.2.7 and add py39-cvxopt variant

[MacPorts]

#64493: py-cvxopt 1.2.5: Upgrade cvxopt version to 1.2.7 and add py39-cvxopt
variant
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  Reporter:  bal-agates  |      Owner:  jjstickel
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.1
Resolution:              |   Keywords:  haspatch
      Port:  py-cvxopt   |
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Comment (by reneeotten):

 If you're familiar with GitHub, submitting a [https://github.com/macports
 /macports-ports/pulls PR] with the suggested changes is often the fastest
 way of getting updates incorporated.

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Ticket URL: <https://trac.macports.org/ticket/64493#comment:2>
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