[MacPorts] #46004: perl5.18: update to 5.18.4

[MacPorts]

#46004: perl5.18: update to 5.18.4
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 Reporter:  mojca@…  |      Owner:  emer@…
     Type:  update   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  perl5.18
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 A new version of perl5.18 is out.

 Can you please take a look?

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Ticket URL: <https://trac.macports.org/ticket/46004>
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