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

[MacPorts]

#70023: gtkmm @3.24.9: would like to have an updated ports version to v4.0
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 Reporter:  andrew-goldtux  |      Owner:  (none)
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.9.3
 Keywords:                  |       Port:  gtkmm
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 currently developing on Inkscape and they are asking for a package install
 for gtkmm4, would be great to have an updated port from gtkmm3 to gtkmm4!

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Ticket URL: <https://trac.macports.org/ticket/70023>
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