⬆️ backend: Bump @graphql-codegen/typescript (#1158)

Bumps [@graphql-codegen/typescript](https://github.com/dotansimha/graphql-code-generator/tree/HEAD/packages/plugins/typescript/typescript) from 3.0.4 to 4.0.1.
- [Release notes](https://github.com/dotansimha/graphql-code-generator/releases)
- [Changelog](https://github.com/dotansimha/graphql-code-generator/blob/master/packages/plugins/typescript/typescript/CHANGELOG.md)
- [Commits](https://github.com/dotansimha/graphql-code-generator/commits/@graphql-codegen/typescript@4.0.1/packages/plugins/typescript/typescript)

---
updated-dependencies:
- dependency-name: "@graphql-codegen/typescript"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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