Bump jupyterlab-manager version

scipy-notebook/Dockerfile

@@ -48,7 +48,9 @@ RUN conda install --quiet --yes \
     # Activate ipywidgets extension in the environment that runs the notebook server
     jupyter nbextension enable --py widgetsnbextension --sys-prefix && \
     # Also activate ipywidgets extension for JupyterLab
-    jupyter labextension install @jupyter-widgets/jupyterlab-manager@^0.37.0 && \
+    # Check this URL for most recent compatibilities
+    # https://github.com/jupyter-widgets/ipywidgets/tree/master/packages/jupyterlab-manager
+    jupyter labextension install @jupyter-widgets/jupyterlab-manager@^0.38.0 && \
     # Pin to 0.6.2 until we can move to Lab 0.35 (jupyterlab_bokeh didn't bump to 0.7.0)
     jupyter labextension install jupyterlab_bokeh@0.6.2 && \
     npm cache clean --force && \