Bumped version to fix PyPI upload.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
3 jobs for v0.18.11 in 10 minutes and 30 seconds (queued for 16 minutes and 8 seconds)
latest
Status Name Job ID Coverage
  Test
passed test_gms_preprocessing #48062

00:09:42

63.0%
passed test_styles #48063

00:00:23

 
  Deploy
passed deploy_pypi #48064

00:00:24