Bump webpack-merge from 5.0.9 to 5.1.2

Bumps [webpack-merge](https://github.com/survivejs/webpack-merge) from 5.0.9 to 5.1.2.
- [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/v5.0.9...v5.1.2)

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

package-lock.json

@@ -29237,9 +29237,9 @@
       }
     },
     "webpack-merge": {
-      "version": "5.0.9",
-      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-5.0.9.tgz",
-      "integrity": "sha512-P4teh6O26xIDPugOGX61wPxaeP918QOMjmzhu54zTVcLtOS28ffPWtnv+ilt3wscwBUCL2WNMnh97XkrKqt9Fw==",
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-5.1.2.tgz",
+      "integrity": "sha512-/slG0Kh0OKTf0zxdFJlhQHzv8bU9gUYVK5DkBjB3i/yoc1Xx4ADG0KITGO5S/6cqn2Ug43+8VR6Sz8daA/c+5g==",
       "dev": true,
       "requires": {
         "clone-deep": "^4.0.1",

package.json

@@ -290,6 +290,6 @@
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0",
     "webpack-hot-middleware": "^2.25.0",
-    "webpack-merge": "^5.0.9"
+    "webpack-merge": "^5.1.2"
   }
 }