chore: TerserPlugin 添加 parallel 支持

vue.config.js

@@ -31,6 +31,7 @@ module.exports = {
       }
     }
   },
+
   chainWebpack: config => {
     const { codeInspectorPlugin } = require('code-inspector-plugin')
 
@@ -59,6 +60,7 @@ module.exports = {
     config.optimization = {
       minimizer: [
         new TerserPlugin({
+          parallel: true,
           terserOptions: {
             output: {
               comments: false