Merge branch '6.4' into 7.0

* 6.4:
  Fix implicitly-required parameters
  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
  [Messenger][AmazonSqs] Allow async-aws/sqs version 2

Author: nicolas-grekas

CoverageListener.php

@@ -26,7 +26,7 @@ class CoverageListener implements TestListener
     private $sutFqcnResolver;
     private $warningOnSutNotFound;
 
-    public function __construct(callable $sutFqcnResolver = null, bool $warningOnSutNotFound = false)
+    public function __construct(?callable $sutFqcnResolver = null, bool $warningOnSutNotFound = false)
     {
         $this->sutFqcnResolver = $sutFqcnResolver ?? static function (Test $test): ?string {
             $class = \get_class($test);

DeprecationErrorHandler/Configuration.php

@@ -70,7 +70,7 @@ class Configuration
      * @param string      $baselineFile     The path to the baseline file
      * @param string|null $logFile          The path to the log file
      */
-    private function __construct(array $thresholds = [], string $regex = '', array $verboseOutput = [], string $ignoreFile = '', bool $generateBaseline = false, string $baselineFile = '', string $logFile = null)
+    private function __construct(array $thresholds = [], string $regex = '', array $verboseOutput = [], string $ignoreFile = '', bool $generateBaseline = false, string $baselineFile = '', ?string $logFile = null)
     {
         $groups = ['total', 'indirect', 'direct', 'self'];