Bump ansi-html and webpack-hot-middleware in /client

Removes [ansi-html](https://github.com/Tjatse/ansi-html). It's no longer used after updating ancestor dependency [webpack-hot-middleware](https://github.com/webpack-contrib/webpack-hot-middleware). These dependencies need to be updated together.


Removes `ansi-html`

Updates `webpack-hot-middleware` from 2.25.0 to 2.25.3
- [Release notes](https://github.com/webpack-contrib/webpack-hot-middleware/releases)
- [Changelog](https://github.com/webpack-contrib/webpack-hot-middleware/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-hot-middleware@v2.25.0...v2.25.3)

---
updated-dependencies:
- dependency-name: ansi-html
  dependency-type: indirect
- dependency-name: webpack-hot-middleware
  dependency-type: direct:development
...

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

Author: dependabot[bot]

client/package-lock.json

@@ -61,7 +61,7 @@
     "webpack": "^2.7.0",
     "webpack-bundle-analyzer": "^3.3.2",
     "webpack-dev-middleware": "^1.12.2",
-    "webpack-hot-middleware": "^2.22.1",
+    "webpack-hot-middleware": "^2.25.3",
     "webpack-merge": "^2.6.1"
   },
   "engines": {