[MacPorts] #55446: gnucash-devel: update to version 2.7.2, modernize dependencies

[MacPorts]

#55446: gnucash-devel: update to version 2.7.2, modernize dependencies
---------------------+---------------------------
 Reporter:  dbevans  |      Owner:  drkp
     Type:  update   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  gnucash-devel
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 The current unstable  version of gnucash-devel is version 2.7.2 and
 (finally) is a gtk3 port with modernized dependencies.

 In particular, libgnomecanvas and libgoffice08 are no longer required and
 the webkit requirement has been updated to webkit2-gtk as requested in
 #52404.

 Hopefully gnucash will be similarly updated in the 2.8 stable branch.

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Ticket URL: <https://trac.macports.org/ticket/55446>
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