config: lock date-fns peer dependencies version

[jakobe]

Which issue does this PR close?

This PR closes #3309

What is the new behavior?

Locks the version of date-fns peer dependencies.

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Are there any additional context?

Checklist:

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Reminders

• [ ] Make sure you have implemented tests following the guidelines in: "The good: Test".
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Review

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When the pull request has been approved it will be merged to develop by Team Kirby.