[MacPorts] #33875: notmuch: update to 0.12 and fix livecheck

[MacPorts]

#33875: notmuch: update to 0.12 and fix livecheck
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 Reporter:  ryandesign@…             |       Owner:  yeled@…           
     Type:  update                   |      Status:  new               
 Priority:  Normal                   |   Milestone:                    
Component:  ports                    |     Version:  2.0.4             
 Keywords:                           |        Port:  notmuch           
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 notmuch 0.12 is available so the port should probably be updated to that
 version.

 The livecheck doesn't work and should probably be fixed.

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Ticket URL: <https://trac.macports.org/ticket/33875>
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