[MacPorts] #68481: boost182, boost183: provide ports for new versions

[MacPorts]

#68481: boost182, boost183: provide ports for new versions
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  Reporter:  barracuda156  |      Owner:  mascguy
      Type:  update        |     Status:  assigned
  Priority:  Low           |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  boost         |
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Changes (by artkiver):

 * Attachment "Portfile.boost183" added.

 WIP Portfile for boost183

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Ticket URL: <https://trac.macports.org/ticket/68481>
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