Merge branch '5.0' into 5.1

* 5.0:
  [VarDumper] fix typo
  Fix support for PHP8 union types
  [FrameworkBundle] preserve dots in query-string when redirecting
  [3.4] Fix support for PHP8 union types
  [PhpUnitBridge] Streamline ansi/no-ansi of composer according to phpunit --colors option
  [3.4] Small update in our internal terminology
  [Cache] fix compat with DBAL v3
  [HttpClient] Convert CurlHttpClient::handlePush() to instance method
  [VarDumper] Fix CliDumper coloration
  [DI] tighten detection of local dirs to prevent false positives
  [FrameworkBundle] preserve dots in query-string when redirecting
  Fix precendence in 4.4
  bumped Symfony version to 3.4.43
  updated VERSION for 3.4.42
  update CONTRIBUTORS for 3.4.42
  updated CHANGELOG for 3.4.42

Author: nicolas-grekas

Normalizer/AbstractNormalizer.php

@@ -411,7 +411,7 @@ protected function instantiateObject(array &$data, string $class, array &$contex
     protected function denormalizeParameter(\ReflectionClass $class, \ReflectionParameter $parameter, string $parameterName, $parameterData, array $context, string $format = null)
     {
         try {
-            if (($parameterType = $parameter->getType()) && !$parameterType->isBuiltin()) {
+            if (($parameterType = $parameter->getType()) instanceof \ReflectionNamedType && !$parameterType->isBuiltin()) {
                 $parameterClass = $parameterType->getName();
                 new \ReflectionClass($parameterClass); // throws a \ReflectionException if the class doesn't exist