[MacPorts] #70262: spatialindex: update to 2.0.0

[MacPorts]

#70262: spatialindex: update to 2.0.0
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 Reporter:  justinbb  |      Owner:  (none)
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  spatialindex
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 The long overdue libspatialindex 2.0.0 release has been made. It is
 important to incorporate it into MacPorts quickly as it includes a
 necessary fix for using the library on macOS (correctly choosing a temp
 file directory rather than trying to create temporary files in the
 current, likely unwritable, directory).

 QGIS is one of several dependencies on this project.

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Ticket URL: <https://trac.macports.org/ticket/70262>
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