To fix this notebook, use> d3 = require('d3-scale@2','d3-array@1','d3-fetch@1','d3-selection@1','d3-timer@1','d3-color@1','d3-format@1','d3-ease@1','d3-interpolate@2','d3-axis@2', 'd3-geo@1', 'd3-selection-multi@1');