Upgrade to jupyterlab 2.0.0 and make it look good. #62
Description
https://jupyterlab.readthedocs.io/en/stable/getting_started/changelog.html#v2-0-0 brings in a lot of nice UI changes to JupyterLab.
- Renovate already has a PR for this. Update dependency jupyterlab to v2 - autoclosed #58
- Need to update https://github.com/dotmesh-io/jupyterlab-plugin to support v2.0.0 and test this end to end and release.