Bump superdesk-planning from cefe2fb to 1f6ea4b in /client (#282)

Bumps [superdesk-planning](https://github.com/superdesk/superdesk-planning) from `cefe2fb` to `1f6ea4b`.
- [Release notes](https://github.com/superdesk/superdesk-planning/releases)
- [Commits](superdesk/superdesk-planning@cefe2fb...1f6ea4b)

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

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