[MacPorts] #53544: rust @1.15.1: update to 1.16.0

[MacPorts]

#53544: rust @1.15.1: update to 1.16.0
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  Reporter:  l2dy    |      Owner:  g5pw
      Type:  update  |     Status:  reopened
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  rust    |
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Comment (by g5pw):

 Thanks for the heads-up, but please don't recycle old tickets to do that.

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Ticket URL: <https://trac.macports.org/ticket/53544#comment:3>
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