Bump wrangler from 3.8.0 to 3.19.0 in /backend (#85)

Bumps [wrangler](https://github.com/cloudflare/workers-sdk/tree/HEAD/packages/wrangler) from 3.8.0 to 3.19.0.
- [Release notes](https://github.com/cloudflare/workers-sdk/releases)
- [Changelog](https://github.com/cloudflare/workers-sdk/blob/main/packages/wrangler/CHANGELOG.md)
- [Commits](https://github.com/cloudflare/workers-sdk/commits/[email protected]/packages/wrangler)

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

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