[MacPorts] #56639: libgit2-glib @0.26.2_2: update to 0.26.4

[MacPorts]

#56639: libgit2-glib @0.26.2_2: update to 0.26.4
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 Reporter:  l2dy    |      Owner:  dbevans
     Type:  update  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  libgit2-glib
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 https://ftp.gnome.org/pub/GNOME/sources/libgit2-glib/0.26/libgit2-glib-0.26.4.news

 > * Make meson the official build system

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Ticket URL: <https://trac.macports.org/ticket/56639>
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