jupyter labextension install @ijmbarr/jupyterlab_spellchecker
An error occured.
ValueError: This extension does not yet support the current version of JupyterLab.
Conflicting Dependencies:
JupyterLab Extension Package
>=1.0.0 <2.0.0 >=0.19.1 <0.20.0@jupyterlab/application
>=1.0.0 <2.0.0 >=0.19.1 <0.20.0@jupyterlab/apputils
>=1.0.0 <2.0.0 >=0.19.1 <0.20.0@jupyterlab/notebook