[MacPorts] #44361: p5-io: Add perl 5.18 and 5.20 subports

[MacPorts]

#44361: p5-io: Add perl 5.18 and 5.20 subports
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 Reporter:  mf2k@…       |      Owner:  pixilla@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  p5-io
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 Please add perl 5.18 and 5.20 subports to the p5-io port

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Ticket URL: <https://trac.macports.org/ticket/44361>
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