Merge branch '5.4' into 6.0

* 5.4:
  Fix merge
  [Serializer] fix reading unset properties
  [Serializer] fix support for lazy properties
  remove FlattenExceptionNormalizer definition if serializer not available

Author: nicolas-grekas

DependencyInjection/FrameworkExtension.php

@@ -1862,6 +1862,10 @@ private function registerMessengerConfiguration(array $config, ContainerBuilder
 
         $loader->load('messenger.php');
 
+        if (!interface_exists(DenormalizerInterface::class)) {
+            $container->removeDefinition('serializer.normalizer.flatten_exception');
+        }
+
         if (ContainerBuilder::willBeAvailable('symfony/amqp-messenger', AmqpTransportFactory::class, ['symfony/framework-bundle', 'symfony/messenger'])) {
             $container->getDefinition('messenger.transport.amqp.factory')->addTag('messenger.transport_factory');
         }

Resources/config/notifier_transports.php

@@ -96,7 +96,7 @@
             ->parent('notifier.transport_factory.abstract')
             ->tag('texter.transport_factory')
 
-        ->set('notifier.transport_factory.allmysms', AllMySmsTransportFactory::class)
+        ->set('notifier.transport_factory.all-my-sms', AllMySmsTransportFactory::class)
             ->parent('notifier.transport_factory.abstract')
             ->tag('texter.transport_factory')
 
@@ -168,7 +168,7 @@
             ->parent('notifier.transport_factory.abstract')
             ->tag('chatter.transport_factory')
 
-        ->set('notifier.transport_factory.gatewayapi', GatewayApiTransportFactory::class)
+        ->set('notifier.transport_factory.gateway-api', GatewayApiTransportFactory::class)
             ->parent('notifier.transport_factory.abstract')
             ->tag('texter.transport_factory')