Issue #3232097 by daffie, longwave: [Symfony 6] Add "array" type hint to methods overriding Symfony\Component\EventDispatcher\EventSubscriberInterface::getSubscribedEvents()

Issue #3209618 by catch, longwave, Neslee Canil Pinto, daffie, andypost, Gábor Hojtsy: [Symfony 6] Symfony\Component\HttpKernel\Event\KernelEvent::isMasterRequest() is deprecated, use isMainRequest() instead

Issue #3094398 by martin107, alexpott, andypost, klausi: Update Symfony response and request events to new classes

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2463009 by Wim Leers: Introduce CacheableResponseInterface: consolidate ways of setting X-Drupal-Cache-Tags/Contexts headers

Issue #2464659 by Wim Leers, rteijeiro: Routes that are varied by the 'user.permissions' cache context for anonymous users must also get the anonymous Role's cache tag