chore(deps-dev): bump @contentful/app-sdk from 4.17.2 to 4.19.0 (#1565)

Bumps [@contentful/app-sdk](https://github.com/contentful/ui-extensions-sdk) from 4.17.2 to 4.19.0.
- [Release notes](https://github.com/contentful/ui-extensions-sdk/releases)
- [Changelog](https://github.com/contentful/ui-extensions-sdk/blob/master/CHANGELOG.md)
- [Commits](contentful/ui-extensions-sdk@v4.17.2...v4.19.0)

---
updated-dependencies:
- dependency-name: "@contentful/app-sdk"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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