fix: use babel-preset target current

.babelrc

@@ -4,7 +4,7 @@
             "env",
             {
                 "targets": {
-                    "node": 4
+                    "node": "current",
                 }
             }
         ],

core/utils/workbox.js

@@ -2,7 +2,9 @@
  * @file utils.workbox.js
  * @author lavas
  */
-import {version} from 'workbox-sw/package.json';
+import {basename} from 'path';
+
+export const WORKBOX_PATH = require.resolve('workbox-sw');
 
 /**
  * get workbox files
@@ -11,8 +13,10 @@ import {version} from 'workbox-sw/package.json';
  * @return {Array} files .js & .map
  */
 export function getWorkboxFiles(isProd) {
+    let filename = isProd
+        ? basename(WORKBOX_PATH) : basename(WORKBOX_PATH).replace('prod', 'dev');
     return [
-        `workbox-sw.${isProd ? 'prod' : 'dev'}.v${version}.js`,
-        `workbox-sw.${isProd ? 'prod' : 'dev'}.v${version}.js.map`
+        filename,
+        `${filename}.map`
     ];
 }

core/webpack.js

@@ -20,7 +20,7 @@ import WorkboxWebpackPlugin from 'workbox-webpack-plugin';
 
 import {vueLoaders, styleLoaders} from './utils/loader';
 import {assetsPath} from './utils/path';
-import {getWorkboxFiles} from './utils/workbox';
+import {WORKBOX_PATH, getWorkboxFiles} from './utils/workbox';
 import {LAVAS_DIRNAME_IN_DIST, SERVER_BUNDLE, ASSETS_DIRNAME_IN_DIST} from './constants';
 
 import fs from 'fs';
@@ -268,8 +268,6 @@ export default class WebpackConfig {
         }];
         // Copy workbox.dev|prod.js from node_modules manually.
         if (this.isProd && workboxConfig) {
-            // node_modules/workbox-sw/build/importScripts/workbox-sw.prod.v2.1.2.js
-            const WORKBOX_PATH = require.resolve('workbox-sw');
             copyList = copyList.concat(
                 getWorkboxFiles(this.isProd)
                     .map(f => {