[MacPorts] #54891: py-cairo @1.10.0_3: update to latest version 1.15.3

[MacPorts]

#54891: py-cairo @1.10.0_3: update to latest version 1.15.3
---------------------+------------------------
 Reporter:  dbevans  |      Owner:  seanfarley
     Type:  update   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  py-cairo
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 Since version 1.11.0 pycairo has moved to GitHub and pycairo and py2cairo
 have been merged back into one project.

 See https://github.com/pygobject/pycairo

 Required to update py-gobject3 to latest version (py-gobject3 3.26.0
 requires pycairo >= 1.11.1).

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Ticket URL: <https://trac.macports.org/ticket/54891>
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