Issue #3420990 by godotislate, smustgrave, alexpott, kim.pepper, longwave: Convert Constraint plugin discovery to attributes

Issue #3112452 by lalitware, guilhermevp, narendra.rajwar27, WagnerMelo, ravi.shankar, mradcliffe, adalbertov, himanshu_sindhwani, quondam, Vidushi Mehta, alexpott, longwave, anmolgoyal74: Fix indentation consistency in core's yaml files

Issue #2824935 by idebr, mfernea, Deepak Goyal, pfrenssen, longwave, hgunicamp, jofitz, andypost, daffie: Fix Squiz.ControlStructures.SwitchDeclaration coding standard

Issue #3072702 by alexpott, Wim Leers, mikelutz, xjm, catch, Berdir, tedbow, webchick, shaal, Mixologic, heddn: Core extensions should not need to specify the new core_version_requirement in *.info.yml files so that 9.0.x can be installed

Issue #2821077 by Wim Leers, dawehner, tedbow, amateescu, tstoeckler, alexpott: PATCHing entities validates the entire entity, also unmodified fields, so unmodified fields can throw validation errors

Issue #2854543 by Wim Leers, polynya, dawehner, mpdonadio, gabesullice, larowlan, klausi: NegotiationMiddleware calls $request->setRequestFormat('html') when there is no _format request parameter, but shouldn't

Issue #2943338 by Wim Leers: rest_test module for testing REST module could be reused by contrib JSON API module

Issue #2928702 by Wim Leers, borisson_, tedbow: Make EntityResourceTestBase's field_rest_test_multivalue test field less invasive: omit it from normalizations

Issue #2920001 by Wim Leers, dawehner, borisson_, aheimlich, davidwbarratt: Add cacheable HTTP exceptions: Symfony HTTP exceptions + Drupal cacheability metadata

Issue #2720233 by dawehner, Wim Leers, catch: Use arguments resolver in RequestHandler to have consistent parameter ordering

Revert "Issue #2824851 by Wim Leers, arshadcn, amateescu, tedbow, timmillwood, Berdir, tstoeckler: EntityResource::patch() makes an incorrect assumption about entity keys, hence results in incorrect behavior"

This reverts commit 3b3daa35.

Issue #2824851 by Wim Leers, arshadcn, amateescu, tedbow, timmillwood, Berdir, tstoeckler: EntityResource::patch() makes an incorrect assumption about entity keys, hence results in incorrect behavior

Issue #2817745 by Wim Leers: Add test coverage to prove that REST resource's "auth" configuration is also not allowing global authentication providers like "cookie" when not listed

Issue #2848933 by Wim Leers, tstoeckler: SerializationLinkManagerTest should not enable the rest_test module (because it implicitly enables the rest module)

Issue #2808233 by gnuget, dawehner, Wim Leers, tedbow, Chi, dysrama: REST 403 responses don't tell the user *why* access is not granted: requires deep Drupal understanding to figure out

Issue #2758897 by Wim Leers, damiankloip, larowlan: Move rest module's "link manager" services to serialization module

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method

Revert "Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method"

This reverts commit 59781ffc.

Issue #2737719 by Wim Leers, dawehner: EntityResource: Provide comprehensive test coverage: for every entity type, every format, every method