Update webpack config file after update

backend/webpack.development.js

@@ -1,8 +1,8 @@
 const path = require("path");
-const merge = require("webpack-merge");
+const { merge } = require("webpack-merge");
 const common = require("./webpack.common.js");
 
-module.exports = merge.smart(common, {
+module.exports = merge(common, {
   mode: "development",
   watchOptions: {
     ignored: ["node_modules/**"],

backend/webpack.production.js

@@ -1,6 +1,6 @@
-const merge = require("webpack-merge");
+const { merge } = require("webpack-merge");
 const common = require("./webpack.common.js");
 
-module.exports = merge.smart(common, {
+module.exports = merge(common, {
   mode: "production",
 });

backend/webpack.watch.js

@@ -1,7 +1,7 @@
-const merge = require("webpack-merge");
+const { merge } = require("webpack-merge");
 const common = require("./webpack.common.js");
 
-module.exports = merge.smart(common, {
+module.exports = merge(common, {
   mode: "development",
   watch: true,
   watchOptions: {