[MacPorts] #44567: Upgrade mscgen to 0.2

[MacPorts]

#44567: Upgrade mscgen to 0.2
-----------------------------+-----------------------
  Reporter:  charles.choi@…  |      Owner:  landonf@…
      Type:  update          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  mscgen          |
-----------------------------+-----------------------
Changes (by mf2k@…):

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


Comment:

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

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Ticket URL: <https://trac.macports.org/ticket/44567#comment:2>
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