[MacPorts] #36874: mercurial: update to 2.4

[MacPorts]

#36874: mercurial: update to 2.4
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 Reporter:  sean.michael.farley@…  |      Owner:  macports-tickets@…
     Type:  update                 |     Status:  new
 Priority:  Normal                 |  Milestone:
Component:  ports                  |    Version:  2.1.2
 Keywords:  mercurial, haspatch    |       Port:  mercurial
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 Update mercurial to the newest version: 2.4

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Ticket URL: <https://trac.macports.org/ticket/36874>
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