[MacPorts] #52827: yarn @0.16.1

[MacPorts]

#52827: yarn @0.16.1
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  Reporter:  isomarcte   |      Owner:  macports-tickets@…
      Type:  submission  |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:
      Port:  yarn        |
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Comment (by ryandesign):

 You should use the github portgroup; this will let you remove many lines
 of code that relate to fetching from github.

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Ticket URL: <https://trac.macports.org/ticket/52827#comment:1>
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