[MacPorts] #43959: upgrade icu and all of its dependents

[MacPorts]

#43959: upgrade icu and all of its dependents
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  Reporter:  mcalhoun@…  |      Owner:  macports-tickets@…
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.0
Resolution:              |   Keywords:  haspatch
      Port:  icu         |
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Comment (by mf2k@…):

 There is definitely precedent for doing so with the libpng (r115019) and
 jpeg (r102822) ports.

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Ticket URL: <https://trac.macports.org/ticket/43959#comment:1>
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