[Geotiff] libgeotiff 1.5.0 released

[Even Rouault]

Hi,

libgeotiff 1.5.0 has been released.

https://download.osgeo.org/geotiff/libgeotiff/libgeotiff-1.5.0.tar.gz
https://download.osgeo.org/geotiff/libgeotiff/libgeotiff-1.5.0.zip

The news are:
* Require PROJ >= 6 dependency
* Remove all CSV files used by geo_normalize API, since libgeotiff now relies
  on PROJ database for EPSG CRS definitions.
* geo_normalize.c: SetGTParmIds(): use ProjStraightVertPoleLongGeoKey for 
CT_PolarStereographic
* geo_normalize.c: report StdParallel1 for Mercator_2SP when a PCS code is 
used
* geo_normalize.c: fix support for Laborde Oblique Mercator
* listgeo: use PROJ database to display non-hardcoded values of a number of 
keys

For info, GDAL 2.4.0 builds against it (after re-adding a few symbols that are 
no-op now) and seems to work properly in quick basic manual	 tests, although 
moving the whole stack will require further advances in PROJ 6.0 adoption. The 
natural set of compatible versions (and the one actually tested by continuous 
integration) will be more GDAL 2.5.0 + libgeotiff 1.5.0 + PROJ 6.0

Even

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