[MacPorts] #44309: py-xhtml2pdf: update to version 0.0.6 and switch PIL dependency to PIL/Pillow

[MacPorts]

#44309: py-xhtml2pdf: update to version 0.0.6 and switch PIL dependency to
PIL/Pillow
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 Reporter:  ionic@…   |      Owner:  macports-tickets@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  haspatch  |       Port:  py-xhtml2pdf
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 This will update `py-xhtml2pdf` to version 0.0.6 which includes `Pillow`
 support introduced by upstream.

 Also changes the formerly `py*-pil` dependency to a hybrid `PIL`/`Pillow`
 one as discussed in #44284.

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Ticket URL: <https://trac.macports.org/ticket/44309>
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