Drop UglifyJS webpack plugin in favor of Terser

package.json

@@ -44,6 +44,7 @@
     "node-sass": "^4.14.0",
     "nodemon": "^2.0.3",
     "sass-loader": "^10.0.1",
+    "terser-webpack-plugin": "^4.2.2",
     "ts-jest": "^26.1.1",
     "ts-loader": "^8.0.4",
     "typescript": "^4.0.2",

webpack.config.js

@@ -1,6 +1,6 @@
 const path = require('path');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
+const TerserPlugin = require('terser-webpack-plugin');
 
 const dev = process.env.NODE_ENV === 'development';
 
@@ -90,8 +90,9 @@ const config = {
 
 if (!dev) {
     config.optimization = {
+        minimize: true,
         minimizer: [
-            new UglifyJSPlugin(),
+            new TerserPlugin(),
         ]
     };
 }