Update for VCS Context2D release

[scottwittenburg]

I have tested out this project with the VCS context2d-alpha-release topic and identified some steps we'll need to take to make sure this project keeps working after that PR is merged:

1. Inside the environment where we expect to use this project, we need to pip installl wslink[security]
2. Inside that same environment, we need to conda install -c cdat compute_graph cdat_compute_graph
3. Two of the twelve tests are failing now (the image diffs are only slightly higher than the passing threshold, but new baselines are required anyway)
4. Currently I notice that the 3D pane in the interactive demo is missing it's plot, but that might just be because the environment I installed is missing some fixes made recently to dv3d.

I don't think any of that should be too big a deal.

[scottwittenburg]

ping @doutriaux1 @danlipsa @aashish24

[doutriaux1]

@scottwittenburg thanks,