Upgrade ipywidgets in scipy for compatibility with 0.31 jupyterlab version

scipy-notebook/Dockerfile

@@ -19,7 +19,7 @@ USER $NB_USER
 # use notebook-friendly backends in these images
 RUN conda install --quiet --yes \
     'nomkl' \
-    'ipywidgets=7.0*' \
+    'ipywidgets=7.1*' \
     'pandas=0.19*' \
     'numexpr=2.6*' \
     'matplotlib=2.0*' \
@@ -47,7 +47,7 @@ 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@^0.31.0 && \
+    jupyter labextension install @jupyter-widgets/jupyterlab-manager@^0.33.1 && \
     npm cache clean && \
     rm -rf $CONDA_DIR/share/jupyter/lab/staging && \
     fix-permissions $CONDA_DIR