Update CleanWebpackPlugin in webpack.config.js

Author: TCourtneyOwen

webpack.config.js

@@ -1,5 +1,5 @@
 const devCerts = require("office-addin-dev-certs");
-const CleanWebpackPlugin = require("clean-webpack-plugin");
+const { CleanWebpackPlugin } = require("clean-webpack-plugin");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
 const CustomFunctionsMetadataPlugin = require("custom-functions-metadata-plugin");
 const HtmlWebpackPlugin = require("html-webpack-plugin");