Merge branch '1.x' into 2.x

* 1.x:
  Decouple psr-http-message-bridge from extra.symfony.require for versions before 6.4
  Fix keeping platform requirements when rebooting composer

Author: nicolas-grekas

src/Flex.php

@@ -814,6 +814,9 @@ private function reinstall(Event $event, bool $update)
             $composer->getEventDispatcher(),
             $composer->getAutoloadGenerator()
         );
+        if (method_exists($installer, 'setPlatformRequirementFilter')) {
+            $installer->setPlatformRequirementFilter(((array) $this->installer)["\0*\0platformRequirementFilter"]);
+        }
 
         if (!$update) {
             $installer->setUpdateAllowList(['php']);

src/PackageFilter.php

@@ -80,6 +80,7 @@ public function removeLegacyPackages(array $data, RootPackageInterface $rootPack
                 !isset($knownVersions['splits'][$name])
                 || array_intersect($versions, $lockedVersions[$name] ?? [])
                 || (isset($rootConstraints[$name]) && !Intervals::haveIntersections($this->symfonyConstraints, $rootConstraints[$name]))
+                || ('symfony/psr-http-message-bridge' === $name && 6.4 > $versions[0])
             )) {
                 $filteredPackages[] = $package;
                 continue;