[5.2] Invoke sendLogoutResponse method when logout

[ElfSundae]

Give app a chance to return custom response.

[GrahamCampbell]

Surely you should just override the logout() method?

[ElfSundae]

Just like AuthenticatesUsers::handleUserWasAuthenticated, maybe the controller wants to return a JSON response in this sendLogoutResponse method, or flash data.
Of cause we can overwrite or override the logout() method, but when the Laravel framework updates, we may should modify the overwritten method again if there are new features in the logout() method.

[ElfSundae]

Ref. #13818

[taylorotwell]

Just override the logout method. That is the intention.