Merge branch '3.4' into 4.4

* 3.4:
  [PhpUnitBridge] fix syntax on PHP 5.3
  [PhpUnitBridge] Fix undefined index when output of "composer show" cannot be parsed
  properly cascade validation to child forms
  [PhpUnitBridge] fix undefined var on version 3.4
  bumped Symfony version to 3.4.42
  updated VERSION for 3.4.41
  update CONTRIBUTORS for 3.4.41
  updated CHANGELOG for 3.4.41

bin/simple-phpunit.php

@@ -182,6 +182,11 @@
         }
     }
 
+    $info += [
+        'versions' => [],
+        'requires' => ['php' => '*'],
+    ];
+
     if (1 === \count($info['versions'])) {
         $passthruOrFail("$COMPOSER create-project --ignore-platform-reqs --no-install --prefer-dist --no-scripts --no-plugins --no-progress --ansi -s dev phpunit/phpunit $PHPUNIT_VERSION_DIR \"$PHPUNIT_VERSION.*\"");
     } else {