At least one holiday is necessary

[Narigo]

Steps to reproduce

1. Try to put in opening hours without any holidays
2. Press submit
3. See error

What is the current bug behavior?
It does not save and throws an error in the console

What is the expected correct behavior?
It should save without any set holidays.

Relevant logs and/or screenshots
-

Possible fixes
update-shop-app should have holidays || [] if holidays is not defined