Expose d3-require’s default resolve.

Author: mbostock

src/index.js

@@ -1,2 +1,3 @@
 export {default as FileAttachments} from "./fileAttachment.js";
 export {default as Library} from "./library.js";
+export {resolve} from "./require.js";

src/require.js

@@ -1,5 +1,7 @@
 import {require as requireDefault, requireFrom} from "d3-require";
 
+export const resolve = requireDefault.resolve;
+
 export default function(resolve) {
   return resolve == null ? requireDefault : requireFrom(resolve);
 }