Stop calling Spree::Refund#perform! after creating a refund

[DanielePalombo]

From Solidus v3.0 onwards, #perform! will need to be explicitly called when creating new refunds. Please, change your code from:

Spree::Refund.create(your: attributes)

to:

Spree::Refund.create(your: attributes, perform_after_creation: false).perform!

The perform_after_creation attribute will be removed in Solidus 3.x.

Stop calling perform! as Spree::Refund after_create callback #3641 (kennyadsl)

Look for:

For solidus 2.11 looks for Spree::Refund.create/new without perform_after_create

---

For Solidus < 2.11 we can consider patching the model by overriding the method as done here:

solidusio/solidus@3d6f510

solidus_minimum_version: 2.11

[DanielePalombo]

The merged PR is #11.

I discussed it with @piyushswain and @michellecrisologo, but I don't think it will be ok, because the perform! method is automatically executed when the Refund is created. If someone installs rubocop-solidus on a previous solidus version it will autocorrect it, calling the method twice.

[DanielePalombo]

Will need to research how to do the version checks on Rails/Solidus so that this won't run if the version is not correct.

[DanielePalombo]

we have to set the solidus minimum version on the cop

[MassimilianoLattanzio]

Added minimum Solidus version in #43