Bump webpack-dev-server from 1.16.5 to 3.1.11

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 1.16.5 to 3.1.11.
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v1.16.5...v3.1.11)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -44,6 +44,6 @@
     "react-dom": "^16",
     "sinon": "^1.17.4",
     "webpack": "^1.13.0",
-    "webpack-dev-server": "^1.14.1"
+    "webpack-dev-server": "^3.1.11"
   }
 }