[MacPorts] #51444: docker-machine: update to 0.7.0

[MacPorts]

#51444: docker-machine: update to 0.7.0
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 Reporter:  aaron+macports@…  |      Owner:  macports-tickets@…
     Type:  update            |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:
 Keywords:  haspatch          |       Port:  docker-machine
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Ticket URL: <https://trac.macports.org/ticket/51444>
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