chore(deps-dev): bump webpack-dev-server in /wj-vue

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) from 2.11.3 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](https://github.com/webpack/webpack-dev-server/compare/v2.11.3...v3.1.11)
Signed-off-by: Ndependabot[bot] <support@github.com>

wj-vue/package.json

@@ -83,7 +83,7 @@
     "vue-template-compiler": "^2.6.10",
     "webpack": "^3.6.0",
     "webpack-bundle-analyzer": "^3.3.2",
-    "webpack-dev-server": "^2.9.1",
+    "webpack-dev-server": "^3.1.11",
     "webpack-merge": "^4.1.0"
   },
   "engines": {