Update pip requirements file

Author: mwcraig

requirements.txt

@@ -1,24 +1,24 @@
-bqplot==0.12.29
-ipycanvas==0.8.2
-ipycytoscape==1.2.2
-ipydatagrid==1.0.7
-ipygany==0.5.0
-ipyleaflet==0.14.0
-ipympl==0.7.0
-ipytree==0.2.1
-ipyvolume==0.6.0a8
-ipyvuetify==1.7.0
-ipywidgets==7.6
-jupyterlab==3
-numpy
-pandas
-pythreejs==2.3.0
-pyvista==0.31.3
-requests
-scikit-image
-scipy
-sidecar==0.5.1
-voila==0.2.10
-voila-vuetify==0.5.2
-voila-material==0.4.0
-vtk==8.2.0
+ bqplot==0.12.33
+ branca==0.5.0
+ ipycanvas==0.12.0
+ ipycytoscape==1.3.3
+ ipydatagrid==1.1.12
+ ipyevents==2.0.1
+ ipygany==0.5.0
+ ipyleaflet==0.16.0
+ ipympl==0.9.1
+ ipytree==0.2.1
+ ipyvolume==0.6.0a8
+ ipyvuetify==1.8.2
+ ipywidgets==7.7.0
+ jupyterlab==3.4
+ numpy
+ pandas
+ pythreejs==2.3.0
+ pyvista==0.34.0
+ requests
+ scikit-image
+ scipy
+ sidecar==0.5.1
+ voila==0.3.5
+ vtk==9.1.0