[MacPorts] #58514: swig: update to 4.0.0

[MacPorts]

#58514: swig: update to 4.0.0
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  Reporter:  luzpaz  |      Owner:  michaelld
      Type:  update  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  swig    |
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Comment (by chrstphrchvz):

 The PR was merged, with swig3 now a separate port. Can this be closed?

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Ticket URL: <https://trac.macports.org/ticket/58514#comment:5>
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