Index: node_modules/d3-selection/src/namespaces.js
===================================================================
--- node_modules/d3-selection/src/namespaces.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-selection/src/namespaces.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,9 @@
+export var xhtml = "http://www.w3.org/1999/xhtml";
+
+export default {
+  svg: "http://www.w3.org/2000/svg",
+  xhtml: xhtml,
+  xlink: "http://www.w3.org/1999/xlink",
+  xml: "http://www.w3.org/XML/1998/namespace",
+  xmlns: "http://www.w3.org/2000/xmlns/"
+};