Merge branch '6.3' into 6.4

* 6.3:
  minor #53524 [Messenger] [AmazonSqs] Allow `async-aws/sqs` version 2 (smoench)
  Fix bad merge
  List CS fix in .git-blame-ignore-revs
  Fix implicitly-required parameters
  List CS fix in .git-blame-ignore-revs
  Apply php-cs-fixer fix --rules nullable_type_declaration_for_default_null_value

Author: nicolas-grekas

Node/ElementNode.php

@@ -26,7 +26,7 @@ class ElementNode extends AbstractNode
     private ?string $namespace;
     private ?string $element;
 
-    public function __construct(string $namespace = null, string $element = null)
+    public function __construct(?string $namespace = null, ?string $element = null)
     {
         $this->namespace = $namespace;
         $this->element = $element;

Node/SelectorNode.php

@@ -26,7 +26,7 @@ class SelectorNode extends AbstractNode
     private NodeInterface $tree;
     private ?string $pseudoElement;
 
-    public function __construct(NodeInterface $tree, string $pseudoElement = null)
+    public function __construct(NodeInterface $tree, ?string $pseudoElement = null)
     {
         $this->tree = $tree;
         $this->pseudoElement = $pseudoElement ? strtolower($pseudoElement) : null;

Parser/Parser.php

@@ -29,7 +29,7 @@ class Parser implements ParserInterface
 {
     private Tokenizer $tokenizer;
 
-    public function __construct(Tokenizer $tokenizer = null)
+    public function __construct(?Tokenizer $tokenizer = null)
     {
         $this->tokenizer = $tokenizer ?? new Tokenizer();
     }

XPath/Translator.php

@@ -48,7 +48,7 @@ class Translator implements TranslatorInterface
     private array $pseudoClassTranslators = [];
     private array $attributeMatchingTranslators = [];
 
-    public function __construct(ParserInterface $parser = null)
+    public function __construct(?ParserInterface $parser = null)
     {
         $this->mainParser = $parser ?? new Parser();