[MacPorts] #58118: xcpretty @0.2.8: update to 0.3.0

[MacPorts]

#58118: xcpretty @0.2.8: update to 0.3.0
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  Reporter:  FranklinYu  |      Owner:  seanfarley
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  xcpretty    |
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Comment (by FranklinYu):

 Actually I think the port should bundle dependency `rouge` with it.
 RubyGems support gem bundling by

 {{{
 gem install --install-dir libexec --bindir bin xcpretty
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58118#comment:1>
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