Merge pull request #52 from nutgram/fix/handle-null-values-correctly

fix: handle null values correctly in EnumOrScalar property resolution

Author: sergix44

src/Resolver/EnumOrScalar.php

@@ -29,7 +29,7 @@ public function resolve(string $propertyName, array $propertyTypes, array $data)
             );
         }
 
-        $value = $data[$propertyName] ?? array_shift($data);
+        $value = array_key_exists($propertyName, $data) ? $data[$propertyName] : array_shift($data);
         if ((is_string($value) || is_int($value)) && $enumClass::tryFrom($value) !== null) {
             return $enum;
         }