chore: switch from uglifyjs-webpack-plugin to terser-webpack-plugin (#2742)

closes #2245

Author: haoqunjiang

packages/@vue/cli-service/lib/config/prod.js

@@ -26,10 +26,10 @@ module.exports = (api, options) => {
       if (process.env.VUE_CLI_TEST) {
         webpackConfig.optimization.minimize(false)
       } else {
-        const UglifyPlugin = require('uglifyjs-webpack-plugin')
-        const uglifyOptions = require('./uglifyOptions')
+        const TerserPlugin = require('terser-webpack-plugin')
+        const terserOptions = require('./terserOptions')
         webpackConfig.optimization.minimizer([
-          new UglifyPlugin(uglifyOptions(options))
+          new TerserPlugin(terserOptions(options))
         ])
       }
     }

packages/@vue/cli-service/lib/config/uglifyOptions.js renamed to packages/@vue/cli-service/lib/config/terserOptions.js

@@ -1,5 +1,5 @@
 module.exports = options => ({
-  uglifyOptions: {
+  terserOptions: {
     compress: {
       // turn off flags with small gains to speed up minification
       arrows: false,

packages/@vue/cli-service/package.json

@@ -60,8 +60,8 @@
     "source-map-url": "^0.4.0",
     "ssri": "^6.0.0",
     "string.prototype.padend": "^3.0.0",
+    "terser-webpack-plugin": "^1.1.0",
     "thread-loader": "^1.1.5",
-    "uglifyjs-webpack-plugin": "^1.2.7",
     "url-loader": "^1.1.0",
     "vue-loader": "^15.4.2",
     "webpack": "^4.15.1",