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>

Author: derrabus

Tests/PipeStdinInStdoutStdErrStreamSelect.php

@@ -34,7 +34,7 @@
         exit(ERR_TIMEOUT);
     }
 
-    if (in_array(\STDOUT, $w) && strlen($out) > 0) {
+    if (in_array(\STDOUT, $w) && '' !== $out) {
         $written = fwrite(\STDOUT, (string) $out, 32768);
         if (false === $written) {
             exit(ERR_WRITE_FAILED);
@@ -45,7 +45,7 @@
         $write = array_diff($write, [\STDOUT]);
     }
 
-    if (in_array(\STDERR, $w) && strlen($err) > 0) {
+    if (in_array(\STDERR, $w) && '' !== $err) {
         $written = fwrite(\STDERR, (string) $err, 32768);
         if (false === $written) {
             exit(ERR_WRITE_FAILED);