[MacPorts] #41958: Update py-dulwich to 0.9.4

[MacPorts]

#41958: Update py-dulwich to 0.9.4
----------------------------+--------------------------------
 Reporter:  macports.org@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.2.1
 Keywords:                  |       Port:  py-dulwich
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 dulwich > 0.9.0 changed part of the API, and these API changes were
 effected in the recently-updated-to-0.5.0 hggit [114849]. As a result,
 trying to clone a git repository with the macports-installed hg-git will
 error out. Things work fine with dulwich 0.9.4.

 See http://www.samba.org/~jelmer/dulwich/ for official releases

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Ticket URL: <https://trac.macports.org/ticket/41958>
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