[Laravel] Relation methods other than HasMany that return multiple results are not working

[amermchaudhary]

API Platform version(s) affected: 3.*, 4.*

Description
If I use a relation other than HasMany that returns multiple items then the API does not work correctly because it tries to return a single item

How to reproduce
use a HasManyThrough, BelongsToMany, MorphMany, or MorphToMany relation

Possible Solution
In src/Laravel/Eloquent/Metadata/Factory/Property/EloquentPropertyMetadataFactory.php#L96
Change this if statement to include other possible relations that return a collection

[amermchaudhary]

Fix merged into 4.0 branch