migrate to terser-webpack-plugin

Author: tiagoschenkel

package.json

@@ -102,12 +102,12 @@
     "rimraf": "^3.0.0",
     "sinon": "^7.5.0",
     "sinon-chai": "^3.3.0",
+    "terser-webpack-plugin": "^2.3.4",
     "ts-loader": "^6.2.1",
     "ts-node": "^8.4.1",
     "tslint": "^5.20.0",
     "tslint-config-prettier": "^1.18.0",
     "typescript": "^3.6.4",
-    "uglifyjs-webpack-plugin": "^2.2.0",
     "webpack": "^4.41.2",
     "webpack-cli": "^3.3.10",
     "webpack-concat-plugin": "^3.0.0",

webpack.config.js

@@ -1,6 +1,6 @@
 const webpack = require("webpack");
 const path = require("path");
-const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
 
 module.exports = env => {
   if (!env) env = { production: false, karma: false };
@@ -51,10 +51,10 @@ module.exports = env => {
           concatenateModules: true,
           minimize: true,
           minimizer: [
-            new UglifyJsPlugin({
+            new TerserPlugin({
               cache: true,
               parallel: 4,
-              uglifyOptions: {
+              terserOptions: {
                 output: {
                   comments: false
                 }