Update package from gitlab repo

The parameters might not all be required but it works for upgrading a package from the gitlab server:

pip install scikit-build
pip install --no-cache-dir --no-deps --upgrade --no-build-isolation -i https://gitlab.dune-project.org/api/v4/projects/812/packages/pypi/simple dune-fem

I've used this now to pass on a patch to a user.

Please add if you have another suggestion.

I was wondering if we should add a command, i.e., to dune._mmain__ that allows to do such an update, for example

  python -m dune update -i gitlab fem

that does the same?