[MacPorts] #34294: mercurial: update to 2.2

[MacPorts]

#34294: mercurial: update to 2.2
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 Reporter:  sean.michael.farley@…          |       Owner:  macports-tickets@…                   
     Type:  update                         |      Status:  new                                  
 Priority:  Normal                         |   Milestone:                                       
Component:  ports                          |     Version:  2.0.4                                
 Keywords:                                 |        Port:  mercurial                            
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 Pretty self-explanatory

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Ticket URL: <https://trac.macports.org/ticket/34294>
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