* gnu/packages/geo.scm (osm2pgsql): Update to 1.11.0.
[arguments]: Look for proj API version 6 to use recent proj versions.
[inputs]: Remove proj-7; add cli11 and proj.
Change-Id: If1f14e5c675865d4485b16aca6146f555cc16d5e
Signed-off-by: Guillaume Le Vaillant <glv@posteo.net>