Merge branch '5.3' into 5.4

* 5.3:
  [DependencyInjection] only allow `ReflectionNamedType` for `ServiceSubscriberTrait`
  Fix CS
  [Intl] Update the ICU data to 70.1
  Default access_decision_manager.strategy option with merge.

Signed-off-by: Alexander M. Turek <me@derrabus.de>

ServiceSubscriberTrait.php

@@ -78,7 +78,7 @@ public static function getSubscribedServices(): array
                     continue;
                 }
 
-                if (!$returnType = $method->getReturnType()) {
+                if (!($returnType = $method->getReturnType()) instanceof \ReflectionNamedType) {
                     continue;
                 }