Bump webpack-merge from 5.3.0 to 5.4.0

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.3.0 to 5.4.0.
- [Release notes](https://github.com/survivejs/webpack-merge/releases)
- [Changelog](https://github.com/survivejs/webpack-merge/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/survivejs/webpack-merge/compare/v5.3.0...v5.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -18,7 +18,7 @@
     "sortablejs": "^1.12.0",
     "underscore": "^1.10.2",
     "vis": "^4.21.0",
-    "webpack-merge": "^5.3.0"
+    "webpack-merge": "^5.4.0"
   },
   "devDependencies": {
     "webpack-dev-server": "^3.11.0"

yarn.lock

@@ -7837,10 +7837,10 @@ webpack-log@^2.0.0:
     ansi-colors "^3.0.0"
     uuid "^3.3.2"
 
-webpack-merge@^5.3.0:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.3.0.tgz#a80df44d35fabace680bf430a19fda9ec49ed8eb"
-  integrity sha512-4PtsBAWnmJULIJYviiPq4BxwAykbAgGMheyEVaemj2bJI54h+p/gnlbXZEH2EM0IYC3blOE1Qm6kzKlc06N1UQ==
+webpack-merge@^5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.4.0.tgz#81bef0a7d23fc1e6c24b06ad8bf22ddeb533a3a3"
+  integrity sha512-/scBgu8LVPlHDgqH95Aw1xS+L+PHrpHKOwYVGFaNOQl4Q4wwwWDarwB1WdZAbLQ24SKhY3Awe7VZGYAdp+N+gQ==
   dependencies:
     clone-deep "^4.0.1"
     wildcard "^2.0.0"