[MacPorts] #38861: update cgal to version 4.2

[MacPorts]

#38861: update cgal to version 4.2
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  Reporter:  mmoll@…  |      Owner:  vince@…
      Type:  update   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.1.3
Resolution:           |   Keywords:
      Port:  cgal     |
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Comment (by vince@…):

 It’s okay now. I have updated both lua and ipe, so I’ve committed the new
 Portfile for 4.2 in r105914. Please test and tell me if it works.

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Ticket URL: <https://trac.macports.org/ticket/38861#comment:4>
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