Problem/Motivation
See issue title
tl;dr
Remove \Drupal\Tests\jsonapi\Kernel\JsonapiKernelTestBase::createEntityReferenceField and use \Drupal\Tests\field\Traits\EntityReferenceTestTrait::createEntityReferenceField instead
See issue title
tl;dr
Remove \Drupal\Tests\jsonapi\Kernel\JsonapiKernelTestBase::createEntityReferenceField and use \Drupal\Tests\field\Traits\EntityReferenceTestTrait::createEntityReferenceField instead