ADD(ci) webpack build

.travis.yml

@@ -17,3 +17,4 @@ script:
 - npm run test:typings
 - npm run test:deps
 - npm run test:size
+- npm run build:size

config/webpack.config.js

@@ -1,6 +1,6 @@
 
 const path = require('path');
-const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+const TerserPlugin = require('terser-webpack-plugin');
 const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
 
 
@@ -17,7 +17,10 @@ module.exports = {
     entry: './dist/es/browserify.index.js',
     optimization: {
         minimizer: [
-            new UglifyJsPlugin()
+            new TerserPlugin({
+                cache: true,
+                parallel: true,
+            })
         ]
     },
     plugins,

package.json

@@ -99,6 +99,7 @@
     "rimraf": "2.6.3",
     "solhint": "2.0.0",
     "solidity-cli": "1.0.3",
+    "terser-webpack-plugin": "1.2.3",
     "ts-node": "8.1.0",
     "typescript": "3.4.5",
     "uglify-es": "3.3.9",