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] <support@github.com>

Author: dependabot[bot]

package.json

@@ -63,7 +63,7 @@
     "webpack": "^4.12.0",
     "webpack-cli": "^3.0.7",
     "webpack-dev-middleware": "^1.5.0",
-    "webpack-dev-server": "^1.14.1",
+    "webpack-dev-server": "^3.1.11",
     "webpack-hot-middleware": "^2.6.0",
     "webpack-merge": "^4.1.3",
     "webpack-pwa-manifest": "^3.6.2"