ipywidgets: Conflicting nodejs dependencies when installing jupyter-widgets in jupyterlab 0.30.1

When trying to add jupyter-widgets in jupyterlab 0.30.1 it fails with the following message. Using jupyterlab 0.29.2 works fine.

virtualenv was used.

$ jupyter labextension install @jupyter-widgets/jupyterlab-manager
> /home/costrouc/.local/bin/npm pack @jupyter-widgets/jupyterlab-manager
jupyter-widgets-jupyterlab-manager-0.30.1.tgz

"@jupyter-widgets/jupyterlab-manager@0.30.1" is not compatible with the current JupyterLab
Conflicting Dependencies:
JupyterLab              Extension            Package
>=0.13.1-0 <0.14.0-0    >=0.12.0-0 <0.13.0-0 @jupyterlab/application
>=0.13.0-0 <0.14.0-0    >=0.12.0-0 <0.13.0-0 @jupyterlab/coreutils
>=0.13.0-0 <0.14.0-0    >=0.12.0-0 <0.13.0-0 @jupyterlab/notebook
>=0.13.0-0 <0.14.0-0    >=0.12.0-0 <0.13.0-0 @jupyterlab/rendermime
>=0.52.0-0 <0.53.0-0    >=0.51.0-0 <0.52.0-0 @jupyterlab/services