Merge branch '4.3' into 4.4

* 4.3: (26 commits)
  Fix Twig 1.x compatibility
  [Translator] Improve farsi(persian) translations for Form
  Improve fa translations
  Spell "triggering" properly
  Added tests to cover the possibility of having scalars as services.
  fixed tests on old PHP versions
  [FrameworkBundle] Inform the user when save_path will be ignored
  fixed CS
  [SecurityBundle] Fix profiler dump for non-invokable security listeners
  fixed CS
  [Messenger] Doctrine Transport: Support setting auto_setup from DSN
  [Translator] Load plurals from po files properly
  [Serializer]: AbstractObjectNormalizer ignores the property types of discriminated classes
  [EventDispatcher] Add tag kernel.rest on 'debug.event_dispatcher' service
  [Console] Update to inherit and add licence
  Add missing test for workflow dump description
  [Intl] Remove --dev from intl compile autoloader
  [Messenger] fix publishing headers set on AmqpStamp
  Remove call to deprecated method
  [Intl] Init compile tmp volume
  ...

Author: nicolas-grekas

DataCollector/LoggerDataCollector.php

@@ -149,7 +149,7 @@ private function getContainerDeprecationLogs()
         return $logs;
     }
 
-    private function getContainerCompilerLogs(?string $compilerLogsFilepath = null): array
+    private function getContainerCompilerLogs(string $compilerLogsFilepath = null): array
     {
         if (!file_exists($compilerLogsFilepath)) {
             return [];

EventListener/LocaleAwareListener.php

@@ -63,7 +63,7 @@ public static function getSubscribedEvents()
         ];
     }
 
-    private function setLocale(string $locale, ?string $defaultLocale = null): void
+    private function setLocale(string $locale, string $defaultLocale = null): void
     {
         foreach ($this->localeAwareServices as $service) {
             try {