Changes for compatibility with pystencils 2.0

.gitlab-ci.yml

conftest.py

doc/notebooks/demo_interpolation_boundary_conditions.ipynb

doc/notebooks/demo_thermalized_lbm.ipynb

pytest.ini

src/lbmpy/_compat.py

src/lbmpy/advanced_streaming/indexing.py

src/lbmpy/boundaries/boundaries_in_kernel.py

src/lbmpy/boundaries/boundaryconditions.py

src/lbmpy/boundaries/boundaryhandling.py

src/lbmpy/creationfunctions.py

src/lbmpy/custom_code_nodes.py

src/lbmpy/fieldaccess.py

src/lbmpy/lbstep.py

src/lbmpy/lookup_tables.py

src/lbmpy/methods/cumulantbased/fourth_order_correction.py

src/lbmpy/methods/cumulantbased/galilean_correction.py

src/lbmpy/moment_transforms/abstractmomenttransform.py

src/lbmpy/moment_transforms/rawmomenttransforms.py

src/lbmpy/phasefield_allen_cahn/contact_angle.py