Description

Make only jupyterlab as requirement (Installing jupyter notebooks with pip leads to problems)
Remove pinning dash version (The problems why the version was pinned have been fixed.)
Remove Werkzeug as requirement, it is installed when dash or jupyter_dash is installed

Type of change

Bug fix (non-breaking change which fixes an issue)

[x] New and adjusted code is formatted using the pre-commit hooks
[x] New and adjusted code includes type hinting now
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation
[x] I have added tests that prove my fix is effective or that my feature works
[x] New and existing unit tests pass locally with my changes
[x] The Read the Docs documentation is compiling correctly
[x] If new packages are needed, I added them the setup.py, and if needed the rtd_requirements.txt, the eDisGo_env.yml and the eDisGo_env_dev.yml.
[x] I have added new features to the corresponding whatsnew file