Bump webpack from 4.42.1 to 5.94.0 in /frontend

Bumps [webpack](https://github.com/webpack/webpack) from 4.42.1 to 5.94.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.42.1...v5.94.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

frontend/package.json

@@ -18,7 +18,7 @@
     "vue-datetime": "^1.0.0-beta.11",
     "vue-material": "^1.0.0-beta-11",
     "vue-slicksort": "^1.1.3",
-    "webpack": "^4.42.1",
+    "webpack": "^5.94.0",
     "weekstart": "^1.0.1"
   },
   "devDependencies": {