[MacPorts] #39748: py-libxslt: update to 1.1.28

[MacPorts]

#39748: py-libxslt: update to 1.1.28
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 Reporter:  jmr@…   |      Owner:  sfiera@…
     Type:  update  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-libxslt
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 Should be updated to match libxslt.

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Ticket URL: <https://trac.macports.org/ticket/39748>
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