Issue #3338328 by Spokje, andypost, longwave, effulgentsia, jungle, catch, smustgrave, Wim Leers: Update to Symfony 6.3

Issue #3320315 by Wim Leers, Anchal_gupta, alexpott, longwave: Allow uppercase service IDs/names — necessary for autowiring support

Issue #2531564 by neclimdul, andypost, chx, cburschka, Spokje, pdenooijer, Charlie ChX Negyesi, znerol, dawehner, longwave, Fabianx, geek-merlin, catch, alexpott: Fix leaky and brittle container serialization solution

Issue #2937010 by longwave, andypost, neclimdul, alexpott, Charlie ChX Negyesi: Bring ContainerBuilder inline with Symfony Container and apply upstream improvements

Issue #3197482 by longwave, Spokje, Taran2L, murilohp, catch, Gábor Hojtsy, daffie: Update Drupal 10 to depend on Symfony 5.4 (as a stepping stone to Symfony 6, for deprecation checking support)

Issue #3231672 by daffie: [Symfony 6] Add "Definition" type hint to Drupal\Core\DependencyInjection\ContainerBuilder::setDefinition()

Issue #3231669 by daffie: [Symfony 6] Add "Alias" type hint to Drupal\Core\DependencyInjection\ContainerBuilder::setAlias()

Issue #3231668 by daffie, catch: [Symfony 6] Add "Definition" type hint to Drupal\Core\DependencyInjection\ContainerBuilder::register()

Issue #3207968 by quietone, longwave, Spokje: Replace @codingStandards comments with phpcs: comments

Issue #3187074 by longwave, daffie, Gábor Hojtsy, alexpott: [Symfony 5] Services are private by default

Issue #2939208 by alexpott, tim.plunkett: Services registered with ContainerBuilder::setDefinition() are removed from container causing a BC break

Issue #2927746 by alexpott, catch, slasher13, mpdonadio, martin107, RoSk0, jibran, larowlan, pounard, Mile23, Jo Fitzgerald, deviantintegral, pritish.kumar: Update Symfony components to 3.4.*

Issue #2712647 by slasher13, klausi, catch, jibran, Manuel Garcia, alexpott, mpdonadio, naveenvalecha, neclimdul, timmillwood, webflo, dawehner, Wim Leers, pounard: Update Symfony components to ~3.2

Revert "Issue #2712647 by klausi, catch, slasher13, jibran, Manuel Garcia, alexpott, naveenvalecha, neclimdul, dawehner, Wim Leers, pounard: Update Symfony components to ~3.1"

This reverts commit a55b8ef1.

Issue #2712647 by klausi, catch, slasher13, jibran, Manuel Garcia, alexpott, naveenvalecha, neclimdul, dawehner, Wim Leers, pounard: Update Symfony components to ~3.1

Issue #2726645 by klausi: Do not @deprecate EntityManager until all usages are removed (helps the Symfony 3 update)

Issue #2572307 by vprocessor, attiks, andriyun, alexpott, pfrenssen: Fix 'Generic.PHP.UpperCaseConstant' coding standard

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

Issue #2608126 by joshi.rohit100: Drop the unused function \Drupal\Core\DependencyInjection\ContainerBuilder::synchronize !

Issue #2550641 by damiankloip: Use assert() in Drupal\Core\DependencyInjection\Container::__sleep instead of trigger error

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files

Issue #2284103 by alexpott, fabpot, damiankloip, Xano, Xen, Berdir: Fixed Remove the request from the container.

Issue #2190643 by Berdir, amateescu, Xano, yched: Serializing the container is a very very bad idea, let's prevent it?.

Issue #2004282 by dawehner, smiletrl, amateescu, tim.plunkett: Injected dependencies and serialization hell .

Conflicts:

	core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php

Issue #1595146 by Niklas Fiekas, cosmicdreams, Rob Loach, effulgentsia: Added Load the HttpKernel from the DI Container.