chore(deps-dev): bump webpack-merge from 5.10.0 to 6.0.1 (#228)

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.10.0 to 6.0.1.
- [Changelog](https://github.com/survivejs/webpack-merge/blob/develop/CHANGELOG.md)
- [Commits](survivejs/webpack-merge@v5.10.0...v6.0.1)

---
updated-dependencies:
- dependency-name: webpack-merge
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

packages/toolkit/package.json

@@ -57,6 +57,6 @@
     "webpack-cli": "^4.2.0",
     "webpack-dev-server": "^3.11.0",
     "webpack-manifest-plugin": "^5.0.0",
-    "webpack-merge": "^5.4.0"
+    "webpack-merge": "^6.0.1"
   }
 }

yarn.lock

@@ -909,7 +909,7 @@ __metadata:
     webpack-cli: "npm:^4.2.0"
     webpack-dev-server: "npm:^3.11.0"
     webpack-manifest-plugin: "npm:^5.0.0"
-    webpack-merge: "npm:^5.4.0"
+    webpack-merge: "npm:^6.0.1"
   languageName: unknown
   linkType: soft
 
@@ -19042,7 +19042,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"webpack-merge@npm:^5.4.0, webpack-merge@npm:^5.7.3":
+"webpack-merge@npm:^5.7.3":
   version: 5.10.0
   resolution: "webpack-merge@npm:5.10.0"
   dependencies:
@@ -19053,6 +19053,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"webpack-merge@npm:^6.0.1":
+  version: 6.0.1
+  resolution: "webpack-merge@npm:6.0.1"
+  dependencies:
+    clone-deep: "npm:^4.0.1"
+    flat: "npm:^5.0.2"
+    wildcard: "npm:^2.0.1"
+  checksum: 10/39ab911c26237922295d9b3d0617c8ea0c438c35a3b21b05506616a10423f5ece1962bccbedec932c5db61af57999b6d055d56d1f1755c63e2701bd4a55c3887
+  languageName: node
+  linkType: hard
+
 "webpack-sources@npm:^1.1.0":
   version: 1.4.3
   resolution: "webpack-sources@npm:1.4.3"
@@ -19233,7 +19244,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"wildcard@npm:^2.0.0":
+"wildcard@npm:^2.0.0, wildcard@npm:^2.0.1":
   version: 2.0.1
   resolution: "wildcard@npm:2.0.1"
   checksum: 10/e0c60a12a219e4b12065d1199802d81c27b841ed6ad6d9d28240980c73ceec6f856771d575af367cbec2982d9ae7838759168b551776577f155044f5a5ba843c