Fixed augmentation for MorphMany relationships.

Author: mefenlon

src/Fieldtypes/BaseFieldtype.php

@@ -7,6 +7,7 @@
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\Relations\MorphToMany;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
 use Statamic\CP\Column;
@@ -175,7 +176,7 @@ public function augment($values)
     {
         $resource = Runway::findResource($this->config('resource'));
 
-        if ($values instanceof HasMany || $values instanceof MorphToMany) {
+        if ($values instanceof HasMany || $values instanceof MorphToMany || $values instanceof MorphMany) {
             $results = $values
                 ->get()
                 ->map->toAugmentedArray()