Bump webpack from 3.12.0 to 5.94.0 in /client

Bumps [webpack](https://github.com/webpack/webpack) from 3.12.0 to 5.94.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v3.12.0...v5.94.0)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: direct:development
...

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

client/package.json

@@ -40,7 +40,7 @@
     "typescript": "^3.4.3",
     "uglify-loader": "^3.0.0",
     "umd-compat-loader": "^2.1.1",
-    "webpack": "^3.12.0"
+    "webpack": "^5.94.0"
   },
   "resolutions": {
     "**/**/kind-of": "^6.0.3",