[MacPorts] #63733: trac: update to latest upstream release (1.5.3)

[MacPorts]

#63733: trac: update to latest upstream release (1.5.3)
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  Reporter:  mascguy  |      Owner:  mascguy
      Type:  update   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  trac     |
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Comment (by mascguy):

 Is their convention to use even numbers for stable releases? If so, I'll
 update the livecheck to take that into account.

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Ticket URL: <https://trac.macports.org/ticket/63733#comment:2>
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