Bump webpack-merge from 4.1.5 to 4.2.1

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 4.1.5 to 4.2.1.
- [Release notes](https://github.com/survivejs/webpack-merge/releases)
- [Changelog](https://github.com/survivejs/webpack-merge/blob/master/CHANGELOG.md)
- [Commits](https://github.com/survivejs/webpack-merge/compare/v4.1.5...v4.2.1)

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

1 files changed, 1 insertions, 1 deletions

diff --git a/package.json b/package.json
index 98d306ce536..f76e437b401 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,6 @@
     "url-loader": "^1.1.2",
     "webpack": "^4.28.4",
     "webpack-cli": "^3.1.2",
-    "webpack-merge": "^4.1.5"
+    "webpack-merge": "^4.2.1"
   }
 }