[MacPorts] #44804: Update protobuf-cpp to 2.6.0

[MacPorts]

#44804: Update protobuf-cpp to 2.6.0
---------------------------+---------------------
  Reporter:  nomis52@…     |      Owner:  blair@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  protobuf-cpp  |
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Changes (by mf2k@…):

 * owner:  macports-tickets@… => blair@…
 * version:  2.3.1 =>


Comment:

 In the future, please Cc the port maintainers ({{{port info --maintainers
 protobuf-cpp}}}).

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Ticket URL: <https://trac.macports.org/ticket/44804#comment:1>
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