Rename of rollup-plugin-npm.

package.json

@@ -34,7 +34,7 @@
     "faucet": "0.0",
     "rollup": "0.25",
     "rollup-plugin-json": "2",
-    "rollup-plugin-npm": "1",
+    "rollup-plugin-node-resolve": "1",
     "tape": "4",
     "uglify-js": "2"
   },

rollup.config.js

 import json from "rollup-plugin-json";
-import npm from "rollup-plugin-npm";
+import node from "rollup-plugin-node-resolve";
 
 export default {
-  plugins: [npm({jsnext: true}), json()],
+  plugins: [node({jsnext: true}), json()],
   moduleName: "d3",
   format: "umd"
 };