Merge branch '6.2' into 6.3

* 6.2:
  [Finder] Fix initial directory is opened twice
  typo fix
  Fix test
  Fix some return types in tests

Author: nicolas-grekas

Tests/Normalizer/AbstractObjectNormalizerTest.php

@@ -763,7 +763,7 @@ protected function getAttributeValue(object $object, string $attribute, string $
     {
     }
 
-    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = [])
+    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = []): void
     {
         $object->$attribute = $value;
     }
@@ -963,7 +963,7 @@ protected function getAttributeValue(object $object, string $attribute, string $
     {
     }
 
-    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = [])
+    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = []): void
     {
         if (property_exists($object, $attribute)) {
             $object->$attribute = $value;
@@ -1084,7 +1084,7 @@ protected function getAttributeValue(object $object, string $attribute, string $
     {
     }
 
-    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = [])
+    protected function setAttributeValue(object $object, string $attribute, $value, string $format = null, array $context = []): void
     {
         $object->$attribute = $value;
     }
@@ -1141,7 +1141,7 @@ public function supportsDenormalization($data, string $type, string $format = nu
             && $this->serializer->supportsDenormalization($data, substr($type, 0, -2), $format, $context);
     }
 
-    public function setSerializer(SerializerInterface $serializer)
+    public function setSerializer(SerializerInterface $serializer): void
     {
         $this->serializer = $serializer;
     }