Enhancement/workaround for missing proj data
$PROJ_LIB was renamed to $PROJ_DATA in proj=9.1.1, which leads to issues with fiona>=1.8.20,<1.9
- https://github.com/conda-forge/pyproj-feedstock/issues/130 -> fix it by setting PROJ_DATA
$PROJ_LIB was renamed to $PROJ_DATA in proj=9.1.1, which leads to issues with fiona>=1.8.20,<1.9