[MacPorts] #33861: yorick-imutil @0.5.5 update to 0.5.7

[MacPorts]

#33861: yorick-imutil @0.5.5 update to 0.5.7
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 Reporter:  thibaut.paumard@…         |       Owner:  macports-tickets@…                   
     Type:  update                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  2.0.4                                
 Keywords:                            |        Port:                                       
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 Upstream moved to github, this patch uses the github PortGroup (thanks
 Ryan for the tip).

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Ticket URL: <https://trac.macports.org/ticket/33861>
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