build(deps-dev): Bump webpack-merge from 5.4.0 to 5.7.3

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.4.0 to 5.7.3.
- [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/v5.4.0...v5.7.3)

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

package.json

@@ -287,6 +287,6 @@
     "webpack-cli": "^4.2.0",
     "webpack-dev-server": "^3.11.0",
     "webpack-hot-middleware": "^2.25.0",
-    "webpack-merge": "^5.4.0"
+    "webpack-merge": "^5.7.3"
   }
 }

yarn.lock

@@ -13518,10 +13518,10 @@ webpack-merge@^4.2.2:
   dependencies:
     lodash "^4.17.15"
 
-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==
+webpack-merge@^5.7.3:
+  version "5.7.3"
+  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.7.3.tgz#2a0754e1877a25a8bbab3d2475ca70a052708213"
+  integrity sha512-6/JUQv0ELQ1igjGDzHkXbVDRxkfA57Zw7PfiupdLFJYrgFqY5ZP8xxbpp2lU3EPwYx89ht5Z/aDkD40hFCm5AA==
   dependencies:
     clone-deep "^4.0.1"
     wildcard "^2.0.0"