Index: node_modules/d3-ease/src/math.js
===================================================================
--- node_modules/d3-ease/src/math.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-ease/src/math.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,4 @@
+// tpmt is two power minus ten times t scaled to [0,1]
+export function tpmt(x) {
+  return (Math.pow(2, -10 * x) - 0.0009765625) * 1.0009775171065494;
+}