[MacPorts] #59940: gobject-introspection: update to latest stable release 1.70.0

[MacPorts]

#59940: gobject-introspection: update to latest stable release 1.70.0
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  Reporter:  giansalvo              |      Owner:  mascguy
      Type:  update                 |     Status:  assigned
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:
Resolution:                         |   Keywords:
      Port:  gobject-introspection  |
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Comment (by michaelld):

 Credit give where it is due!

 For me: Reviewing https://trac.macports.org/ticket/62391 and
 https://trac.macports.org/ticket/61987 to see if those are fixed now. I
 think there were some updated patches provided that I never got around to
 testing. Be good to get this dealt with as best we can!

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Ticket URL: <https://trac.macports.org/ticket/59940#comment:14>
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