parameterize build, export, import of async vs. async-es

.babelrc

@@ -5,6 +5,7 @@
     "browser": {
       "ignore": [
         "src/embark.js",
+        "src/node/async.js",
         "src/node/index.js",
         "src/standalone/index.js"
       ],
@@ -22,7 +23,20 @@
       ]
     },
     "node": {
-      "ignore": ["src/browser.js"],
+      "ignore": ["src/browser.js", "src/node/async.js"],
+      "plugins": [
+        ["@babel/plugin-transform-runtime", {
+          "corejs": 2
+        }]
+      ],
+      "presets": [
+        ["@babel/env", {
+          "targets": {"node": "8.11.3"}
+        }]
+      ]
+    },
+    "node:async": {
+      "ignore": ["src/node/index.js"],
       "plugins": [
         ["@babel/plugin-transform-runtime", {
           "corejs": 2

package.json

@@ -17,9 +17,10 @@
     "src"
   ],
   "scripts": {
-    "babel": "npm run babel:browser && npm run babel:node",
+    "babel": "npm run babel:browser && npm run babel:node && npm run babel:node:async",
     "babel:browser": "cross-env BABEL_ENV=browser babel --out-dir dist/browser src",
     "babel:node": "cross-env BABEL_ENV=node babel --out-dir dist src",
+    "babel:node:async": "cross-env BABEL_ENV=node:async babel --out-dir dist src/node",
     "build": "npm run clean && npm run babel && npm run webpack",
     "clean": "rimraf dist embark.min.js embarkjs-*.tgz package",
     "http-server": "http-server",

src/async.js

@@ -0,0 +1 @@
+export {detectSeries, reduce} from 'async-es';

src/blockchain.js

@@ -1,4 +1,4 @@
-import {reduce} from 'async'
+import {reduce} from './async'
 
 function isNewWeb3_1() {
   return (typeof(web3.version) === "string");

src/node/async.js

@@ -0,0 +1 @@
+export {detectSeries, reduce} from 'async';

src/storage.js

@@ -1,4 +1,4 @@
-import {detectSeries} from 'async';
+import {detectSeries} from './async';
 
 const Storage = {};