Merge branch '5.4' into 6.3

* 5.4:
  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

MockClock.php

@@ -22,7 +22,7 @@ final class MockClock implements ClockInterface
 {
     private \DateTimeImmutable $now;
 
-    public function __construct(\DateTimeImmutable|string $now = 'now', \DateTimeZone|string $timezone = null)
+    public function __construct(\DateTimeImmutable|string $now = 'now', \DateTimeZone|string|null $timezone = null)
     {
         if (\is_string($timezone)) {
             $timezone = new \DateTimeZone($timezone);

MonotonicClock.php

@@ -22,7 +22,7 @@ final class MonotonicClock implements ClockInterface
     private int $usOffset;
     private \DateTimeZone $timezone;
 
-    public function __construct(\DateTimeZone|string $timezone = null)
+    public function __construct(\DateTimeZone|string|null $timezone = null)
     {
         if (false === $offset = hrtime()) {
             throw new \RuntimeException('hrtime() returned false: the runtime environment does not provide access to a monotonic timer.');

NativeClock.php

@@ -20,7 +20,7 @@ final class NativeClock implements ClockInterface
 {
     private \DateTimeZone $timezone;
 
-    public function __construct(\DateTimeZone|string $timezone = null)
+    public function __construct(\DateTimeZone|string|null $timezone = null)
     {
         if (\is_string($timezone ??= date_default_timezone_get())) {
             $this->timezone = new \DateTimeZone($timezone);