Bump superdesk-planning from ae9e2bd to ec31062 in /client (#319)

Bumps [superdesk-planning](https://github.com/superdesk/superdesk-planning) from `ae9e2bd` to `ec31062`.
- [Release notes](https://github.com/superdesk/superdesk-planning/releases)
- [Commits](superdesk/superdesk-planning@ae9e2bd...ec31062)

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

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