F mypy

See merge request !66

Add Python 3.12 to tests

See merge request !132

- Replaces nose

Resolve "EXTERN: Slicing a Container returns a List, not a Container"

See merge request !131

For Python 3.7 as it does not support Literal

# Conflicts:
#   src/caosdb/common/models.py

# Conflicts:
#   unittests/docker/Dockerfile

- include check for TypeError when using bad keys