[MacPorts] #55092: meld: bump to 3.18.0 (python3)

[MacPorts]

#55092: meld: bump to 3.18.0 (python3)
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  Reporter:  elelay  |      Owner:  elelay
      Type:  update  |     Status:  closed
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:  fixed   |   Keywords:  haspatch
      Port:  meld    |
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Comment (by elelay):

 Done, thanks.
 Please let me know if it breaks on High Sierra.

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Ticket URL: <https://trac.macports.org/ticket/55092#comment:3>
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