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

ServiceLocatorTrait.php

@@ -87,7 +87,7 @@ public function getProvidedServices(): array
                 } else {
                     $type = (new \ReflectionFunction($factory))->getReturnType();
 
-                    $this->providedTypes[$name] = $type ? ($type->allowsNull() ? '?' : '').$type->getName() : '?';
+                    $this->providedTypes[$name] = $type ? ($type->allowsNull() ? '?' : '').($type instanceof \ReflectionNamedType ? $type->getName() : $type) : '?';
                 }
             }
         }

ServiceSubscriberTrait.php

@@ -40,7 +40,7 @@ public static function getSubscribedServices(): array
             }
 
             if (self::class === $method->getDeclaringClass()->name && ($returnType = $method->getReturnType()) && !$returnType->isBuiltin()) {
-                $services[self::class.'::'.$method->name] = '?'.$returnType->getName();
+                $services[self::class.'::'.$method->name] = '?'.($returnType instanceof \ReflectionNamedType ? $returnType->getName() : $type);
             }
         }