Issue #3436879 by mondrake: follow-up Fix return typehinting for Compiler and EventSubscriber related classes

Issue #3361401 by Spokje, andypost: Remove remaining occurences of ::supportedInterfaceOrClass property

Issue #3360124 by andypost, elber: Deprecate ::supportedInterfaceOrClass property on normalizer/denormalizers

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

Issue #3330981 by Spokje, smustgrave, mallezie, catch, xjm: Fix PHPStan L1 error "Relying on entity queries to check access by default is deprecated..."

Issue #3266544 by Spokje, xjm, smustgrave, bbrala, catch: Remove remaining (textual) references to the HAL module

Issue #3266568 by mxr576, sourabhjain, quietone: Refactor array_merge() usage in loops as possible for performance

Issue #3174108 by _pratik_, asad_ahmed, rivimey, NivethaSubramaniyan, longwave: FieldableEntityNormalizerTrait::extractBundleData() has incorrect return type

Issue #3276195 by mondrake, catch: Symfony\Component\Serializer\Normalizer\NormalizerInterface::supportsEncoding/supportsDecoding will require a new "array $context" argument in the next major version

Issue #3164210 by jungle, sylus, Akhildev.cs, dww: Refactor array_merge() usage in loops as possible for performance

Issue #3219649 by quietone, murilohp, longwave: Fix spelling for words used once, beginning with 'q' -> 's', inclusive

Issue #3252872 by bbrala, gabesullice, bradjones1, alexpott: Use CacheableSupportsMethodInterface for performance improvement in jsonapi normalizers

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

Issue #3254331 by paulocs, longwave: [Symfony 6] Add "array|string|int|float|bool|\ArrayObject|null" to all Normalizer classes that implement the method ::normalize()

Issue #3232080 by paulocs, daffie, longwave: [Symfony 6] Add "mixed" type hint to all Normalizer classes that implement the method ::denormalize()

Issue #3232832 by daffie, longwave: [Symfony 6] Add various type hints to Drupal\serialization\Encoder\JsonEncoder::supportsEncoding() and ::supportsDecoding() and Drupal\serialization\Encoder\XmlEncoder::supportsEncoding(), ::encode(), ::decode() and ::supportsDecoding()

Issue #3232063 by paulocs, daffie, longwave: [Symfony 6] Add "bool" type hint to Drupal\serialization\Normalizer\NormalizerBase::supportsNormalization() and subclasses

Issue #3207567 by Spokje, quietone, guilhermevp, yogeshmpawar, daffie, alexpott: Fix Drupal.Commenting.FunctionComment.MissingParamComment

Issue #3222251 by bbrala, longwave: [November 8, 2021] Replace all isset constructs with the null coalescing operator

Issue #2997123 by jibran, Wim Leers, bbrala, gabesullice, quietone, axle_foley00, KapilV, acbramley, dpi, mglaman, tstoeckler, e0ipso, Sam152: Cacheability of normalized computed fields' properties is not captured during serialization

Issue #2669074 by kim.pepper, Berdir, gaydabura, andypost, ravi.shankar, KapilV, Wim Leers, bradjones1, nickolaj, alexpott, mondrake, 20th, yogeshmpawar, gaurav.kapoor, voleger, Pavan B S, Neslee Canil Pinto, aerozeppelin, Cameron Tod, daffie, dhruveshdtripathi, abramm, Nono95230, s.messaris, Mile23, claudiu.cristea, larowlan, catch, jibran, SpadXIII: Convert file_create_url() & file_url_transform_relative() to service, deprecate it

Issue #2719649 by Spokje, harsha012, jofitz, vprocessor, nikitagupta, cburschka, rasikap, hitesh-jain, quietone, longwave, mfernea, andypost, klausi, Malevi4, crazyrohila: Fix 'Drupal.Commenting.InlineComment.SpacingBefore' coding standard

Issue #3054510 by greggles, Spokje, bas123, fchandler, effulgentsia, Wim Leers, mr.baileys, patchman-jelmerverkleij: Make a minor docs improvement to NormalizerBase.php in order for Patchman to see it as a newer version than it was prior to SA-CORE-2019-003

Issue #3185652 by jonathan1055, daffie: Fix 'Drupal.Commenting.DocComment.ShortFullStop' coding standard - part 2

Issue #2851394 by GoZ, hgunicamp, oknate, jungle, wolffereast, tameeshb, mmatsoo, ridhimaabrol24, jofitz, swarad07, tanc, shaktik, dimaro, shashikant_chauhan, MerryHamster, quietone, nitesh624, martin_q, boaloysius, gaurav.kapoor, nitvirus, ankithashetty, Munavijayalakshmi, kostyashupenko, leolando.tan, amit.drupal, ravi.shankar, akashkrishnan01, Swapnil_Kotwal, Saviktor, mrinalini9, anmolgoyal74, Venkatesh Rajan.J, shimpy, lomasr, Dinesh18, shubham.prakash, mahtab_alam, markdorison, cilefen, longwave, bleen, xjm, alexpott, gmaltoni: Fix grammar 'a' to 'an' when necessary

Issue #3159102 by Niklan: Documentation for \Drupal\serialization\RegisterEntityResolversCompilerPass is incorrect

Issue #3113876 by Hardik_Patel_12, himmatbhatia, jungle, klausi, longwave: The "Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent::getException()" method is deprecated since Symfony 4.4, use "getThrowable()" instead

Issue #3096290 by andypost, kim.pepper, longwave, nterbogt, Berdir: Remove deprecated drupal_get_user_timezone() from DateTimeNormalizer

Issue #3048498 by jonathan1055, Lendude, naveenvalecha, klausi, alexpott, Gábor Hojtsy: [≈Nov. 11] Fix Drupal.Commenting.Deprecated coding standard

Issue #3002206 by jibran, longwave, truls1502, alexpott, NickWilde: Update the stable version of drupal/coder to ˆ8.3.1

SA-CORE-2019-003 by samuel.mortenson, Berdir, pwolanin, dawehner, cashwilliams, Wim Leers, xjm, larowlan, alexpott, plach, damiankloip, tstoeckler, tedbow, DamienMcKenna, effulgentsia, RobLoach, gabesullice, drumm, heshanlk, dsnopek, fago, miro_dietiker, truls1502

Issue #2926508 by Wim Leers, mpdonadio, joelstein, tacituseu, jhedstrom, effulgentsia, tedbow, mradcliffe, borisson_, dawehner, larowlan: Add DateTimeNormalizer+TimestampNormalizer, deprecate TimestampItemNormalizer: @DataType-level normalizers are reusable by JSON:API

Issue #2957385 by Wim Leers, gabesullice, jibran, tim.plunkett: FieldItemNormalizer never calls @DataType-level normalizer service' ::denormalize() method