add build

node_modules/pn/dgram.js

@@ -0,0 +1,8 @@
+var dgram = require("dgram");
+var promisify = require("./_promisify.js");
+var bind = function(c, f) { return f && f.bind(c); };
+Object.defineProperties(module.exports, {
+  Socket: { enumerable: true, value: dgram.Socket },
+  //_createSocketHandle: // skipping
+  createSocket: { enumerable: true, value: bind(dgram, dgram.createSocket) },
+});