Added abstract class detection when creating ownedby fields

Author: mikebronner

src/Traits/GovernorOwnedByField.php

@@ -33,7 +33,12 @@ protected function createGovernorOwnedByFieldsByPolicy(BasePolicy $policy): bool
 
     protected function createGovernorOwnedByFields(Model $model): bool
     {
-        if (! in_array("GeneaLabs\\LaravelGovernor\\Traits\\Governable", class_uses_recursive($model))) {
+        $class = new ReflectionClass($model);
+
+        if (
+            ! in_array("GeneaLabs\\LaravelGovernor\\Traits\\Governable", class_uses_recursive($model))
+            || $class->isAbstract()
+        ) {
             return false;
         }