Bump webpack-hot-middleware from 2.23.1 to 2.25.0

Bumps [webpack-hot-middleware](https://github.com/webpack-contrib/webpack-hot-middleware) from 2.23.1 to 2.25.0.
- [Release notes](https://github.com/webpack-contrib/webpack-hot-middleware/releases)
- [Commits](https://github.com/webpack-contrib/webpack-hot-middleware/compare/v2.23.1...v2.25.0)

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

package.json

@@ -127,7 +127,7 @@
     "vue-template-compiler": "^2.6.10",
     "webpack": "^3.5.2",
     "webpack-dev-server": "^3.1.11",
-    "webpack-hot-middleware": "^2.18.2",
+    "webpack-hot-middleware": "^2.25.0",
     "webpack-merge": "^4.1.0"
   }
 }