Issue #3109970 by znerol, andypost, Prashant.c, daffie, Wim Leers, dww, catch: Convert uses of $_SESSION in forms and batch

Issue #3395776 by catch, kristiaanvandeneynde, Wim Leers, Fabianx, larowlan: Make POST requests render cacheable

Issue #3414287 by catch, longwave: Avoid reading session from the database multiple times during a big pipe request

Issue #3379885 by catch, Wim Leers: Use MessagesCommand in BigPipe to remove special casing of the messages placeholder

Issue #3401730 by kim.pepper, smustgrave, longwave: Add default autoconfigure to all *.services.yml and remove event_subscriber tags

Issue #3416141 by gorkagr, Jaypan, Wim Leers, alexpott: big_pipe.js' checkMutation() does not check if node exists before using it

Revert "Issue #3416141 by gorkagr, Jaypan, Wim Leers: big_pipe.js' checkMutation() does not check if node exists before using it"

This reverts commit 2d17900f.

Issue #3416141 by gorkagr, Jaypan, Wim Leers: big_pipe.js' checkMutation() does not check if node exists before using it

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

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

Issue #3412168 by godotislate, catch, smustgrave, longwave: Add back "final" to Drupal\big_pipe\StackMiddleware\ContentLength

Issue #3390178 by godotislate, larowlan, catch, pixlkat, Utilvideo, rsnyd, Wim Leers, cilefen, smustgrave, fjgarlin, jakegibs617, seixas, mohithasmukh, very_random_man: big_pipe sometimes fails to load blocks

Issue #3410022 by heddn, larowlan, catch: Regression from #3295790 content-length header set earlier than expected

Issue #3363420 by kim.pepper, longwave, quietone: Use CallableResolver for \Drupal\Core\Render\Renderer::doCallback()

Issue #3379121 by quietone, longwave: Skip spellcheck for 20 nonsense words that are parts of hashes

Issue #3377570 by catch, Wim Leers, mglaman, marcelovani, Kingdutch: Add PHP Fibers support to BigPipe

Issue #2441811 by longwave, daffie, andypost, edurenye, lauriii, joseph.olstad, Wim Leers, smustgrave, effulgentsia, alexpott, larowlan, chx, jibran: Upgrade filter system to HTML5

Issue #3386458 by catch, quietone, alexpott, larowlan: Add GenericModuleTestBase and use it to test general module things

Issue #3362456 by NickDickinsonWilde, Wim Leers, borisson_: Fix all ExtensionExistsConstraint constraint violations in tests

Issue #3362457 by Wim Leers, NickDickinsonWilde: Fix all PluginExistsConstraint constraint violations in tests

Issue #2921133 by quietone, VladimirAus, xjm, ankithashetty, longwave, Prem Suthar, smustgrave, benjifisher, AaronMcHale: Remove "Please" from the codebase

Issue #3295790 by bradjones1, mstrelan, rpayanm, catch, alexpott, acbramley, longwave, kim.pepper, mfb: Post-response task running (destructable services) are actually blocking; add test coverage and warn for common misconfiguration

Issue #3325557 by longwave, mondrake, kim.pepper: Enable more service autowiring by adding interface aliases to core modules

Issue #3354382 by mondrake: [PHPUnit 10] Provide a static viable alternative to $this->prophesize() in data providers

Issue #3353658 by mondrake, smustgrave: [PHPUnit 10] Provide a static alternative to randomMachineName() and implement in data providers