Update circleci/node:8 Docker digest to 54dc3c (#3033)
Update circleci/node:8 Docker digest to 54dc3c (#3033)


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