[MacPorts] #63398: cairo: update to latest release (1.17.4)

[MacPorts]

#63398: cairo: update to latest release (1.17.4)
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 Reporter:  mascguy  |      Owner:  ryandesign
     Type:  update   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  cairo
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 It looks like we're still at version 1.16.0, released in October 2018.

 Let's update to the latest release.

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Ticket URL: <https://trac.macports.org/ticket/63398>
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