[MacPorts] #57504: poppler: update to 0.71.0

[MacPorts]

#57504: poppler: update to 0.71.0
--------------------+----------------------
 Reporter:  mojca   |      Owner:  dbevans
     Type:  update  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  poppler
--------------------+----------------------
 See also http://tug.org/svn/texlive?view=revision&revision=49040 for tex-
 related patches.

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Ticket URL: <https://trac.macports.org/ticket/57504>
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