[MacPorts] #44567: Upgrade mscgen to 0.2

[MacPorts]

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

 Thanks for the request. Do you happen to have a working patch locally? If
 so, I'll be able to get to this quite a bit sooner.

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Ticket URL: <https://trac.macports.org/ticket/44567#comment:3>
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