[MacPorts] #60925: Please update Travis CI builds to MacPorts 2.6.3

[MacPorts]

#60925: Please update Travis CI builds to MacPorts 2.6.3
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by ryandesign):

 I hope I've [changeset:71afd037b730488f37e475372ee2a784d888f048/macports-
 base done this right] (per the [https://github.com/macports/macports-
 base/blob/master/portmgr/ReleaseProcess.md#make-the-release-available-for-
 pull-request-checks-on-travis-ci release process instructions]).

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Ticket URL: <https://trac.macports.org/ticket/60925#comment:1>
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