Update circleci/node:8 Docker digest to 2bdb90 (#3071)
Update circleci/node:8 Docker digest to 2bdb90 (#3071)


jdfreder/nteract,nteract/nteract,nteract/nteract,nteract/composition,rgbkrk/nteract,nteract/nteract,nteract/composition,jdfreder/nteract,nteract/nteract,jdfreder/nteract,rgbkrk/nteract,nteract/composition,rgbkrk/nteract,rgbkrk/nteract,jdfreder/nteract,nteract/nteract,rgbkrk/nteract