[MacPorts] #52574: cargo: update to version 0.13.0

[MacPorts]

#52574: cargo: update to version 0.13.0
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 Reporter:  raimue@…  |      Owner:  sean@…
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.3.4
 Keywords:  haspatch  |       Port:  cargo
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 This update seems trivial. I am not sure if there are any requirements on
 the version of rust or if this should be kept in sync with the rust
 version. Therefore posting it for review first.

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Ticket URL: <https://trac.macports.org/ticket/52574>
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