Merge branch '3.4' into 4.4

* 3.4:
  Make PHP 8 green on Travis

Author: nicolas-grekas

Normalizer/AbstractObjectNormalizer.php

@@ -245,7 +245,7 @@ protected function instantiateObject(array &$data, $class, array &$context, \Ref
      *
      * @return string[]
      */
-    protected function getAttributes($object, $format = null, array $context)
+    protected function getAttributes($object, $format, array $context)
     {
         $class = $this->objectClassResolver ? ($this->objectClassResolver)($object) : \get_class($object);
         $key = $class.'-'.$context['cache_key'];

Tests/Normalizer/GetSetMethodNormalizerTest.php

@@ -663,7 +663,7 @@ class GetConstructorArgsWithDefaultValueDummy
     protected $foo;
     protected $bar;
 
-    public function __construct($foo = [], $bar)
+    public function __construct($foo = [], $bar = null)
     {
         $this->foo = $foo;
         $this->bar = $bar;

Tests/Normalizer/ObjectNormalizerTest.php

@@ -941,7 +941,7 @@ class ObjectConstructorArgsWithDefaultValueDummy
     protected $foo;
     protected $bar;
 
-    public function __construct($foo = [], $bar)
+    public function __construct($foo = [], $bar = null)
     {
         $this->foo = $foo;
         $this->bar = $bar;
@@ -1091,7 +1091,7 @@ class DummyWithConstructorObjectAndDefaultValue
     private $foo;
     private $inner;
 
-    public function __construct($foo = 'a', ObjectInner $inner)
+    public function __construct($foo = 'a', ObjectInner $inner = null)
     {
         $this->foo = $foo;
         $this->inner = $inner;