[MacPorts] #70023: gtkmm @3.24.9: update to 4.0 (was: gtkmm @3.24.9: would like to have an updated ports version to v4.0)

[MacPorts]

#70023: gtkmm @3.24.9: update to 4.0
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  Reporter:  andrew-goldtux  |      Owner:  (none)
      Type:  update          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.9.3
Resolution:                  |   Keywords:
      Port:  gtkmm           |
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Ticket URL: <https://trac.macports.org/ticket/70023#comment:1>
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