Bump webpack-merge from 5.7.0 to 5.7.3

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.7.0 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/v5.7.0...v5.7.3)

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

package.json

@@ -18,7 +18,7 @@
     "sortablejs": "^1.12.0",
     "underscore": "^1.12.0",
     "vis": "^4.21.0",
-    "webpack-merge": "^5.7.0"
+    "webpack-merge": "^5.7.3"
   },
   "devDependencies": {
     "webpack-dev-server": "^3.11.0"

yarn.lock

@@ -7858,10 +7858,10 @@ webpack-log@^2.0.0:
     ansi-colors "^3.0.0"
     uuid "^3.3.2"
 
-webpack-merge@^5.7.0:
-  version "5.7.0"
-  resolved "https://registry.yarnpkg.com/webpack-merge/-/webpack-merge-5.7.0.tgz#004dec31f7a875e590c9731e5bdcd3efad0f2715"
-  integrity sha512-UryoMJGRMwOOh/ie4NXZC1OtT0mkA7Ny2+C/MkWOwTRG+jVNEwChVV/+x8rd+ga2mVLeQ0m+QmzLAg7N36+oag==
+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"