Changes

Bump version: 0.0.11

Tag a new version, and this time adjust pyproject.toml too so we can
publish the new version to pypi. I'm updating the instructions in the
wiki so this is clear in the future:
https://osmocom.org/projects/cellular-infrastructure/wiki/Make_a_new_release

Change-Id: I1b5735abefbd69c0d3301b5506424800db25aec6