[MacPorts] #65129: libnice: Update to 0.1.19

[MacPorts]

#65129: libnice: Update to 0.1.19
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  Reporter:  ryandesign  |      Owner:  dbevans
      Type:  update      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  libnice     |
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Comment (by ryandesign):

 The upstream change in 0.1.18 that makes this not a straightforward
 update:

 > * Remove the autotools build system, now only meson is available

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Ticket URL: <https://trac.macports.org/ticket/65129#comment:1>
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