[MacPorts] #40076: libgit2: update to 0.19.0 (was: Upgrade libgit2 to 0.19.0)

[MacPorts]

#40076: libgit2: update to 0.19.0
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  Reporter:  nvenegas@…  |      Owner:  macports-tickets@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  haspatch
      Port:  libgit2     |
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Changes (by ryandesign@…):

 * keywords:   => haspatch


Comment:

 What's "github.tarball_from archive"? The only valid values for
 github.tarball_from are "downloads" and "tags".

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Ticket URL: <https://trac.macports.org/ticket/40076#comment:2>
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