Merge branch '6.4' into 7.0

* 6.4:
  [Serializer] Improve exception message in UnwrappingDenormalizer
  [PropertyInfo] Update DoctrineExtractor for new DBAL 4 BIGINT type
  Update security.nl.xlf
  [Validator] IBAN Check digits should always between 2 and 98
  [Security] Populate translations for trans-unit 20
  add missing plural translation messages
  filter out empty HTTP header parts
  [String] Fix folded in compat mode
  Remove calls to `getMockForAbstractClass()`
  [ErrorHandler] Do not call xdebug_get_function_stack() with xdebug >= 3.0 when not in develop mode
  [Serializer] Fix type for missing property
  add test for JSON response with null as content
  [Filesystem] Fix dumpFile `stat failed` error hitting custom handler
  Return false in isTtySupported() when open_basedir restrictions prevent access to /dev/tty.
  Remove calls to `TestCase::iniSet()` and calls to deprecated methods of `MockBuilder`
  [PhpUnitBridge] Fix `DeprecationErrorHandler` with PhpUnit 10

Author: fabpot

Diff for: DeprecationErrorHandler.php

@@ -367,6 +367,12 @@ private static function getPhpUnitErrorHandler(): callable
 
         if ('PHPUnit\Util\ErrorHandler::handleError' === $eh) {
             return $eh;
+        } elseif (ErrorHandler::class === $eh) {
+            return function (int $errorNumber, string $errorString, string $errorFile, int $errorLine) {
+                ErrorHandler::instance()($errorNumber, $errorString, $errorFile, $errorLine);
+
+                return true;
+            };
         }
 
         foreach (debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT | \DEBUG_BACKTRACE_IGNORE_ARGS) as $frame) {