[MacPorts] #49776: canto @0.6.13: update to latest version

[MacPorts]

#49776: canto @0.6.13: update to latest version
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  Reporter:  dbevans  |      Owner:  jack@…
      Type:  update   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  canto    |
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Comment (by ryandesign):

 Jack, are you still maintaining this port or would you like to be removed
 as its maintainer?

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Ticket URL: <https://trac.macports.org/ticket/49776#comment:1>
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