[MacPorts] #58158: protobuf3-cpp @3.6.1: update to 3.7.0

[MacPorts]

#58158: protobuf3-cpp @3.6.1: update to 3.7.0
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 Reporter:  FranklinYu  |      Owner:  blair
     Type:  update      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  protobuf3-cpp
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Ticket URL: <https://trac.macports.org/ticket/58158>
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