Issue #3162016 by longwave, andypost, Hardik_Patel_12, catch, alexpott, daffie, Kristen Pol: [Symfony 6] Retrieving a non-string value from "Symfony\Component\HttpFoundation\InputBag::get()" is deprecated

Issue #2903911 by joshmiller, longwave, anmolgoyal74, ankithashetty, init90, Pooja Ganjage, _gradient_, daffie, borisson_: Fix 'Drupal.Commenting.FunctionComment.ParamMissingDefinition' coding standard

Issue #3032390 by alexpott, dww, Pancho, 3CWebDev, kim.pepper, larowlan, Berdir, catch, andypost, chr.fritsch, Wim Leers: Add an event to sanitize filenames during upload

Issue #3055889 by gabesullice, Wim Leers, Spokje, jibran, alexpott, tim.plunkett, larowlan: JsonApiResource\Link objects with inaccessible target urls should not be normalized

Issue #2863652 by alexpott, anmolgoyal74, javi.pl, dww, zaporylie, moinak_dutta, iampuma, a.dmitriiev, benjifisher, Pancho, larowlan, yoroy: Do not allow files with "php|pl|py|cgi|asp|js" extensions to be renamed to *.txt and be uploaded if *.txt is not allowed by the field widget

SA-CORE-2020-012 by ufku, mrf, fgm, samuel.mortenson, dww, Heine, mlhess, David_Rothstein, pwolanin, xjm, fgm, stefan.r, dsnopek, rickmanelius, David Strauss, tedbow, alexpott, dww, larowlan, kim.pepper, Wim Leers, quicksketch, mcdruid, Fabianx, effulgentsia, drumm, pandaski, Mixologic

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 #3055193 by catch, martin107, jungle, mikelutz, longwave, andypost, alexpott, mondrake, tim.plunkett, larowlan: [Symfony 5] The "Symfony\Component\HttpFoundation\File\MimeType\MimeTypeGuesser" class is deprecated since Symfony 4.3, use "Symfony\Component\Mime\MimeTypes" instead

Issue #3072076 by JordanDukart, logickal, gabesullice, cgoffin, patrickfweston, Wim Leers, alexpott, scuba_fly, larowlan, nehiryeli, xjm, borisson_: JSON:API returns a CacheableResponseInterface instance for non-cacheable methods; causes unnecessary exceptions

Issue #3122113 by Suresh Prabhu Parkala, rpayanm, ilgnerfagundes, gabesullice, bbrala, alexpott, xjm: Convert all PHPDoc links targeting JSON:API contrib issues to target Drupal core issues

Issue #3142934 by jungle, mondrake, longwave, Krzysztof Domański, DevJoJodae, Chi, xjm, catch, andypost: Replace \Drupal\Component\Utility\Bytes::toInt() with \Drupal\Component\Utility\Bytes::toNumber() due to return type

(cherry picked from commit 54cc80e4db3bb543156287e0321e76c64db2a87e)

Issue #3115772 by saurabh.rocksoul, swatichouhan012, Wim Leers, alexpott: User::load calls should be avoided in classes, use dependency injection instead in jsonapi module

Issue #3121362 by jungle, Meenakshi.g, dww, xjm, alexpott, tim.plunkett: Fix duplicate word typos (the the, to to, etc.) for code comments

Issue #3103993 by Hardik_Patel_12, Rangaswini, alexpott: Value returned from FileSystem methods are not checked in streamUploadData() function

Issue #3080259 by gabesullice, alexpott, Wim Leers: Links with different target attributes are improperly merged

Issue #3023015 by Berdir, kim.pepper, tinko, mikelutz: Replace usages of deprecated constants in file.inc

Issue #3014277 by gabesullice, e0ipso, Wim Leers, larowlan, jibran, ndobromirov, catch: ResourceTypes should know about their fields

Issue #3036285 by gabesullice, Wim Leers, Spokje, larowlan, catch: Add a \JsonApiResource\Relationship object to carry relationship data, metadata and a link collection

Issue #3070204 by gabesullice, ravi.shankar, Wim Leers, mglaman, catch, larowlan, jibran: Refactor the JSON:API FieldResolver to use a resource type instead of an entity type ID and bundle ID pair

Issue #3057175 by Wim Leers, gabesullice, Berdir: Implementation of user name in JSON:API can result in overwriting data

Issue #3052954 by Wim Leers, gabesullice, garphy: Incorrect use of UnprocessableHttpEntityException in EntityResource::deserialize()

Revert "Issue #3029540 by mikelutz, catch, alexpott, larowlan, Gábor Hojtsy: [Symfony 4] Sub class \Symfony\Component\Validator\ConstraintViolation and use that in \Drupal\Core\TypedData\Validation\ExecutionContext::addViolation()"

This reverts commit 20496dd2.

Issue #3029540 by mikelutz, catch, alexpott, larowlan, Gábor Hojtsy: [Symfony 4] Sub class \Symfony\Component\Validator\ConstraintViolation and use that in \Drupal\Core\TypedData\Validation\ExecutionContext::addViolation()

Issue #2843147 by Wim Leers, e0ipso, gabesullice, dagmar, xjm, effulgentsia, webchick, dww, Berdir, dawehner, colan, mgalalm, govind.maloo, das-peter, jludwig, ndobromirov, martin107, abhisekmazumdar, nuez, catch, amateescu, pwolanin, mallezie, borisson_, jibran, voleger, plach, GeduR, Grimreaper, apupiales, Sutharsan, RenatoG, michaellander, sergesemashko, dbt102, hampercm, dremy, rpayanm, chriscalip, tstoeckler, keopx, skyredwang, Spleshka, RajeevK, matthew.perry, kaysenlau, jazzdrive3, dsdeiz, ebeyrent, acbramley, deviantintegral, samuel.mortenson, DamienMcKenna, mohit_aghera, ibustos, dpolant, garphy: Add JSON:API to core as a stable module