Update webpack.prod.js

Fix build issue

Author: HashemKhalifa

webpack/webpack.prod.js

@@ -1,5 +1,5 @@
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const CleanWebpackPlugin = require('clean-webpack-plugin');
+const { CleanWebpackPlugin } = require('clean-webpack-plugin');
 const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
 const TerserPlugin = require('terser-webpack-plugin');