Index: node_modules/d3-interpolate/src/value.js
===================================================================
--- node_modules/d3-interpolate/src/value.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/value.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,22 @@
+import {color} from "d3-color";
+import rgb from "./rgb.js";
+import {genericArray} from "./array.js";
+import date from "./date.js";
+import number from "./number.js";
+import object from "./object.js";
+import string from "./string.js";
+import constant from "./constant.js";
+import numberArray, {isNumberArray} from "./numberArray.js";
+
+export default function(a, b) {
+  var t = typeof b, c;
+  return b == null || t === "boolean" ? constant(b)
+      : (t === "number" ? number
+      : t === "string" ? ((c = color(b)) ? (b = c, rgb) : string)
+      : b instanceof color ? rgb
+      : b instanceof Date ? date
+      : isNumberArray(b) ? numberArray
+      : Array.isArray(b) ? genericArray
+      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
+      : number)(a, b);
+}