[MacPorts] #49034: the_silver_searcher @0.30.0: update to @0.31.0

[MacPorts]

#49034: the_silver_searcher @0.30.0: update to @0.31.0
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 Reporter:  jpo@…     |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.3
 Keywords:  haspatch  |       Port:  the_silver_searcher
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 Also changing from github to the author's site.

 The github "release" is just the repo state when it was tagged for
 release.

 The release from the author already has autoconf & friends run, so we
 remove the need for use_autoreconf, and as a separate benefit gain the
 ability to verify with pgp.

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Ticket URL: <https://trac.macports.org/ticket/49034>
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