Bump ui5-middleware-simpleproxy in /app/travel_processor (#680)

Bumps [ui5-middleware-simpleproxy](https://github.com/ui5-community/ui5-ecosystem-showcase/tree/HEAD/packages/ui5-middleware-simpleproxy) from 0.9.10 to 3.0.0.
- [Changelog](https://github.com/ui5-community/ui5-ecosystem-showcase/blob/main/packages/ui5-middleware-simpleproxy/CHANGELOG.md)
- [Commits](https://github.com/ui5-community/ui5-ecosystem-showcase/commits/ui5-middleware-simpleproxy@3.0.0/packages/ui5-middleware-simpleproxy)

---
updated-dependencies:
- dependency-name: ui5-middleware-simpleproxy
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

app/travel_processor/package.json

@@ -25,7 +25,7 @@
     "karma-chrome-launcher": "^3.2.0",
     "karma-ui5": "^3.0.3",
     "puppeteer": "^21.0.1",
-    "ui5-middleware-simpleproxy": "^0.9.9",
+    "ui5-middleware-simpleproxy": "^3.0.0",
     "ui5-task-zipper": "^3.0.0"
   }
 }