Merge pull request #188 from UniversityOfHelsinkiCS/renovate/date-fns-4.x

fix(deps): update dependency date-fns to v4

Author: AleksTeresh

package-lock.json

@@ -81,7 +81,7 @@
     "@vitejs/plugin-react": "^4.2.1",
     "axios": "^1.6.8",
     "cors": "^2.8.5",
-    "date-fns": "^3.3.1",
+    "date-fns": "^4.0.0",
     "dotenv": "^16.4.1",
     "express": "^4.18.2",
     "express-async-errors": "^3.1.1",