#### What? Why?

[Explain why is this change needed and the solution you propose. Provide
context for others to understand it]

#### What should we test?

[List which features should be tested and how]

#### Release notes

[In case this should be present in the release notes, please write them or
remove this section otherwise]

#### How is this related to the Spree upgrade?

[Any known conflicts with the Spree Upgrade? explain them or remove this section
otherwise]

#### Discourse thread

[Is there a discussion about this in Discourse? add the link if so or remove
this section otherwise]

#### Dependencies

[Does this PR depend on another one? add the link of so or remove this section
otherwise]

#### What? Why?

Closes #[the issue number this PR is related to]

[Explain why is this change needed and the solution you propose. Provide
context for others to understand it]

#### What should we test?

[List which features should be tested and how]

#### Release notes

[In case this should be present in the release notes, please write them or
remove this section otherwise]

#### How is this related to the Spree upgrade?

[Any known conflicts with the Spree Upgrade? explain them or remove this section
otherwise]

#### Discourse thread

[Is there a discussion about this in Discourse? add the link if so or remove
this section otherwise]

#### Dependencies

[Does this PR depend on another one? add the link of so or remove this section
otherwise]

Add special keyword syntax to close issue from PR
Add special keyword syntax to close issue from PR

We want the issue to be closed when the PR gets merged but we always
forget to add the "magic" comment as described in
https://help.github.com/articles/closing-issues-using-keywords/.
