build(deps): bump node-forge and webpack-dev-server in /demo/vue-cli2

Bumps [node-forge](https://github.com/digitalbazaar/forge) to 1.3.1 and updates ancestor dependency [webpack-dev-server](https://github.com/webpack/webpack-dev-server). These dependencies need to be updated together.


Updates `node-forge` from 0.10.0 to 1.3.1
- [Release notes](https://github.com/digitalbazaar/forge/releases)
- [Changelog](https://github.com/digitalbazaar/forge/blob/main/CHANGELOG.md)
- [Commits](digitalbazaar/forge@0.10.0...v1.3.1)

Updates `webpack-dev-server` from 2.11.5 to 4.11.1
- [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/commits/v4.11.1)

---
updated-dependencies:
- dependency-name: node-forge
  dependency-type: indirect
- dependency-name: webpack-dev-server
  dependency-type: direct:development
...

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

Author: dependabot[bot]

demo/vue-cli2/package-lock.json

@@ -50,7 +50,7 @@
     "vue-template-compiler": "^2.7.14",
     "webpack": "^3.6.0",
     "webpack-bundle-analyzer": "^2.9.0",
-    "webpack-dev-server": "^2.9.1",
+    "webpack-dev-server": "^4.11.1",
     "webpack-merge": "^4.1.0"
   },
   "browserslist": [