Bump superdesk-core from 89030e3 to e74c71d in /client (#341)

Bumps [superdesk-core](https://github.com/superdesk/superdesk-client-core) from `89030e3` to `e74c71d`.
- [Release notes](https://github.com/superdesk/superdesk-client-core/releases)
- [Commits](superdesk/superdesk-client-core@89030e3...e74c71d)

---
updated-dependencies:
- dependency-name: superdesk-core
  dependency-type: direct:production
...

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