Bump http-proxy-middleware in /react-rust-postgres/frontend

Bumps  and [http-proxy-middleware](https://github.com/chimurai/http-proxy-middleware). These dependencies needed to be updated together.

Updates `http-proxy-middleware` from 2.0.3 to 3.0.3
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chimurai/http-proxy-middleware/compare/v2.0.3...v3.0.3)

Updates `http-proxy-middleware` from 1.0.3 to 3.0.3
- [Release notes](https://github.com/chimurai/http-proxy-middleware/releases)
- [Changelog](https://github.com/chimurai/http-proxy-middleware/blob/master/CHANGELOG.md)
- [Commits](https://github.com/chimurai/http-proxy-middleware/compare/v2.0.3...v3.0.3)

---
updated-dependencies:
- dependency-name: http-proxy-middleware
  dependency-type: direct:development
- dependency-name: http-proxy-middleware
  dependency-type: direct:development
...

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

react-rust-postgres/frontend/package.json

@@ -32,6 +32,6 @@
     ]
   },
   "devDependencies": {
-    "http-proxy-middleware": "^1.0.3"
+    "http-proxy-middleware": "^3.0.3"
   }
 }