refactor: update rollup and webpack config

Author: jofftiquez

rollup.config.js

@@ -1,8 +1,8 @@
-export default {
+module.exports = {
   input: 'src/index.js',
   output: {
     file: 'build/vue-html-to-paper.js',
     name: 'VueHtmlToPaper',
-    format: 'umd'
-  }
+    format: 'umd',
+  },
 };

webpack.config.js

@@ -1,54 +1,45 @@
-const path = require('path');
-const webpack = require('webpack');
+var path = require('path');
+var TerserPlugin = require('terser-webpack-plugin');
 var CompressionPlugin = require('compression-webpack-plugin');
 
 module.exports = {
+  mode: 'production',
   entry: './src/index.js',
   output: {
     library: 'VueHtmlToPaper',
     libraryTarget: 'commonjs2',
     path: path.resolve(__dirname, 'dist'),
-    filename: 'index.js'
+    filename: 'index.js',
   },
   module: {
     rules: [
       {
         test: /\.css$/,
-        loader: 'style-loader!css-loader!'
+        use: ['style-loader', 'css-loader'],
       },
       {
-        test: /\.js$/,
-        exclude: /(node_modules)/,
+        test: /\.m?js$/,
+        exclude: /(node_modules|bower_components)/,
         use: {
           loader: 'babel-loader',
           options: {
-            presets: ['env']
-          }
-        }
-      }
-    ]
+            presets: ['@babel/preset-env'],
+          },
+        },
+      },
+    ],
   },
   plugins: [
-    new webpack.optimize.UglifyJsPlugin({
-      mangle: true,
-      compress: {
-        warnings: false, // Suppress uglification warnings
-        pure_getters: true,
-        unsafe: true,
-        unsafe_comps: true,
-        screw_ie8: true
-      },
-      output: {
-        comments: false,
-      },
-      exclude: [/\.min\.js$/gi] // skip pre-minified libs
-    }),
     new CompressionPlugin({
       asset: "[path].gz[query]",
       algorithm: "gzip",
       test: /\.js$|\.css$|\.html$/,
       threshold: 10240,
-      minRatio: 0
-    })
-  ]
-}
+      minRatio: 0,
+    }),
+  ],
+  optimization: {
+    minimize: true,
+    minimizer: [new TerserPlugin()],
+  },
+};