[MacPorts] #52057: gradle: update to 3.0

[MacPorts]

#52057: gradle: update to 3.0
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 Reporter:  aaron+macports@…      |      Owner:  macports-tickets@…
     Type:  update                |     Status:  new
 Priority:  Normal                |  Milestone:
Component:  ports                 |    Version:
 Keywords:  maintainer, haspatch  |       Port:  gradle
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Ticket URL: <https://trac.macports.org/ticket/52057>
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