Bump webpack-dev-server from 3.1.11 to 3.10.2

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 3.1.11 to 3.10.2.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-dev-server/compare/v3.1.11...v3.10.2)

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

package.json

@@ -57,7 +57,7 @@
     "postcss-loader": "3.0.0",
     "url-loader": "1.1.2",
     "webpack": "3.8.1",
-    "webpack-dev-server": "3.1.11",
+    "webpack-dev-server": "3.10.2",
     "webpack-manifest-plugin": "2.2.0"
   },
   "scripts": {