feat: replace lodash with webpack-merge

package.json

@@ -57,7 +57,7 @@
   },
   "dependencies": {
     "deep-for-each": "^3.0.0",
-    "lodash": "^4.17.21"
+    "webpack-merge": "^6.0.1"
   },
   "jest": {
     "collectCoverageFrom": [

src/options/default.js

@@ -1,6 +1,6 @@
 "use strict";
 
-const mergeWith = require("lodash/mergeWith");
+const { merge } = require("webpack-merge");
 
 const gruntOptions = {
   failOnError: (options) => {
@@ -39,13 +39,6 @@ const webpackDevServerOptions = {
   },
 };
 
-// eslint-disable-next-line consistent-return
-function mergeCustomize(a, b) {
-  if (Array.isArray(a) && Array.isArray(b)) {
-    return a.concat(b);
-  }
-}
-
 function mergeOptions(defaultOptions, options, targetOptions) {
   if (Array.isArray(targetOptions) && Array.isArray(options)) {
     if (targetOptions.length !== options.length) {
@@ -55,21 +48,17 @@ function mergeOptions(defaultOptions, options, targetOptions) {
       );
     }
     return targetOptions.map((opt, index) =>
-      mergeWith({}, defaultOptions, options[index], opt, mergeCustomize),
+      merge(defaultOptions, options[index], opt),
     );
   }
 
   if (Array.isArray(targetOptions)) {
-    return targetOptions.map((opt) =>
-      mergeWith({}, defaultOptions, options, opt, mergeCustomize),
-    );
+    return targetOptions.map((opt) => merge(defaultOptions, options, opt));
   } else if (Array.isArray(options)) {
-    return options.map((opt) =>
-      mergeWith({}, defaultOptions, opt, targetOptions, mergeCustomize),
-    );
+    return options.map((opt) => merge(defaultOptions, opt, targetOptions));
   }
 
-  return mergeWith({}, defaultOptions, options, targetOptions, mergeCustomize);
+  return merge(defaultOptions, options, targetOptions);
 }
 
 exports.gruntOptions = gruntOptions;