Add MorphMany relation to replaced whereIn method.

(cherry picked from commit 16a1121098e3fb80c684dccf02ecfb200969beee)

src/Jenssegers/Mongodb/Eloquent/HybridRelations.php

@@ -2,7 +2,6 @@
 
 namespace Jenssegers\Mongodb\Eloquent;
 
-use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Database\Eloquent\Relations\MorphOne;
 use Illuminate\Support\Str;
 use Jenssegers\Mongodb\Helpers\EloquentBuilder;
@@ -11,6 +10,7 @@ use Jenssegers\Mongodb\Relations\BelongsToMany;
 use Jenssegers\Mongodb\Relations\HasMany;
 use Jenssegers\Mongodb\Relations\HasOne;
 use Jenssegers\Mongodb\Relations\MorphTo;
+use Jenssegers\Mongodb\Relations\MorphMany;
 
 trait HybridRelations
 {

src/Jenssegers/Mongodb/Relations/MorphMany.php

+<?php
+
+namespace Jenssegers\Mongodb\Relations;
+
+use Illuminate\Database\Eloquent\Model as EloquentModel;
+use Illuminate\Database\Eloquent\Relations\MorphMany as EloquentMorphMany;
+
+class MorphMany extends EloquentMorphMany
+{
+  /**
+   * Get the name of the "where in" method for eager loading.
+   *
+   * @param \Illuminate\Database\Eloquent\Model $model
+   * @param string $key
+   *
+   * @return string
+   */
+  protected function whereInMethod( EloquentModel $model, $key )
+  {
+    return 'whereIn';
+  }
+}
\ No newline at end of file