Issue #3057070 by joachim, Pancho, nicxvan: Refactor ImageFieldCreationTrait to support entity types other than nodes

Issue #3420981 by kim.pepper, quietone, mstrelan, Berdir, alexpott: Convert FieldType plugin discovery to attributes

Issue #3443300 by mondrake: Fix remaining return*() methods of class PHPUnit\Framework\TestCase deprecated in PHPUnit 10

Issue #3439981 by fago, ericgsmith, petar_basic, acbramley: Uploading a file to media library flushes theme registry

Issue #3440038 by longwave, quietone, mondrake, catch: ImageItem logs an warning instead of triggering an E_USER_WARNING

Issue #3324560 by alexpott, mstrelan, dimitriskr, xjm, longwave, catch: Replace strpos/substr with str_starts_with() / str_contains() / str_ends_with()

Issue #2786735 by recrit, eiriksm, ranjith_kumar_k_u, immaculatexavier, ravi.shankar, zaporylie, smustgrave, TrevorBradley, johnle, GaëlG, jefuri, alexpott, poker10: Image derivative generation does not work if effect "Convert" in use and file stored in private filesystem

Issue #3426506 by kim.pepper, smustgrave, mstrelan, alexpott: Create enums for File exists options and deprecate consts

Issue #3421016 by quietone, godotislate: Convert MigrateProcessPlugin plugin discovery to attributes

Issue #3421020 by godotislate, mohit_aghera, quietone: Convert MigrateField plugin discovery to attributes

Issue #3432852 by mondrake: Method returnArgument() of class PHPUnit\Framework\TestCase is deprecated in PHPUnit 10

Issue #3426309 by Wim Leers, smustgrave: Add config validation for weights (blocks, filters, etc. all use weights)

Issue #2511308 by dimitriskr, ankithashetty, smustgrave, quietone, Wim Leers: Rename RendererInterface::renderPlain() to ::renderInIsolation()

Issue #3420996 by mstrelan, kim.pepper, larowlan: Convert ImageEffect plugin discovery to attributes

Issue #3127116 by phthlaap, AjitS, cmlara, AmbyH, smustgrave, alexpott, quietone: Image styles - thumbnails are broken in config page when private file system is used

Issue #3406267 by deepak.cms, andypost, kostyashupenko, smustgrave, catch, marvil07, nireneko, quietone: All core shipped image styles should include webp conversion

Issue #3353210 by mondrake, PrabuEla, Spokje: [PHPUnit 10] @dataProvider methods must be declared static and public

Issue #3332593 by phenaproxima, Wim Leers, borisson_, lauriii, tim.plunkett: Adopt PluginExists validator in relevant places

Issue #3404508 by mstrelan, smustgrave, quietone: Fix strict type errors in Functional tests: Add casts and fix types where needed

Issue #3412464 by mstrelan, smustgrave: Fix strict type errors: Convert FormattableMarkup to strings (complex replacement) in core Functional tests

Issue #3298701 by cmlara, smustgrave, Rishabh Vishwakarma, Tanuj., larowlan, benjifisher, BramDriesen, catch, Driskell, quietone, effulgentsia: ImageStyleDownloadController routes do not limit schemes served

Issue #3379496 by quietone, smustgrave, longwave: Convert enable/disable to install/uninstall in UI not in hook_help

Issue #3384936 by marvil07, vbouchet, smustgrave, xjm, joachim: Use the API to set up languages in tests that are not specifically testing the language form

Issue #3402295 by mstrelan, dww, smustgrave: Fix strict type errors in kernel tests: Add casts and fix types where needed