[MacPorts] #60456: gdal @3.0.4: update to 3.1.0

[MacPorts]

#60456: gdal @3.0.4: update to 3.1.0
--------------------------+----------------------
 Reporter:  Dave-Allured  |      Owner:  Veence
     Type:  update        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  gdal
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 Please check source and update to latest version.

 Caution, there was an ABI change.  Rev bumps of dependent ports may be
 needed.

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Ticket URL: <https://trac.macports.org/ticket/60456>
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