Test node 8, swiotch back to npm run from yarn run. 
Test node 8, swiotch back to npm run from yarn run. 
vega/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite