[MacPorts] #56327: xonsh @0.6.0 - update release upstream

[MacPorts]

#56327: xonsh @0.6.0 -  update release upstream
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 Reporter:  bestlem  |      Owner:  (none)
     Type:  update   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.4.3
 Keywords:           |       Port:  xonsh xonsh-devel
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 xonsh has a new release 0.6.1 https://github.com/xonsh/xonsh/releases The
 xonsh port should be updated.

 Also I can see no reason for port xonsh-devel @0.5.0-2016-12-21 to exist.
 I think this should be deleted.

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Ticket URL: <https://trac.macports.org/ticket/56327>
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