Issue #3041983 by yogeshmpawar, idebr, pifagor, klausi: Fix unused imports and update Coder to 8.3.4

Issue #2875394 by voleger, erozqba, Berdir, mondrake: Replace all calls to db_query, which is deprecated

Issue #3000931 by mondrake, voleger, andypost, longwave, alexpott, git commit -m 'Issue #3000931 by mondrake, voleger, andypost, longwave, alexpott: Connection::query() does not support '\''targe: Connection::query() does not support 'target' option

Issue #3053827 by gabesullice: Leaked cache metadata detected when using JSON:API to GET a threaded comment when RDF module is installed

Issue #3035980 by jhedstrom: Provide a better error when a NULL is passed to EntityStorageBase::load()

Issue #2892440 by bnjmnm, tedbow, alexpott, Krzysztof Domański, Lendude: Provide helper test method to wait for an element to be removed from the page

Issue #3056875 by alexpott: Remove drupal-phpunit-upgrade-check from run-tests.sh and docs relating to drupal-phpunit-upgrade

Issue #3008870 by amateescu, kostyashupenko, mondrake, jibran, alexpott: Drop support for PHPUnit 4.8 once PHP 5 is no longer supported (8.8.x)

Issue #3053363 by alexpott, Wim Leers, Berdir, mondrake, xjm: Remove support for PHP 5 in Drupal 8.8

Issue #2847678 by mpdonadio, Lendude, Berdir, Mile23, klausi, dawehner, jibran, claudiu.cristea, alexpott: Deprecate WebTestBase and its required classes in favour of BrowserTestBase

Issue #3047866 by mikelutz, Berdir, TR, alexpott, andypost, Satyanarayan Reddy: Remove usage of deprecated \Drupal::entityManager() in core

Issue #3043087 by tedbow, Sam152: Retrieving plugins with entity context definitions from cache is expensive, which is noticeable when used with Layout Builder's FieldBlockDeriver

Revert "Issue #2852463 by mikelutz, tim.plunkett, heddn, xjm, MegaChriz, joachim, phenaproxima, dawehner, benjifisher: Create a trait to implement \Drupal\Component\Plugin\ConfigurableInterface"

This reverts commit 109dfd58.

Issue #2901792 by alexpott, tedbow, dww, bnjmnm, jhodgdon, Krzysztof Domański: Disable all animations in Javascript testing

Revert "Issue #2822778 by wengerk, bighappyface, joelpittet, Lendude, lauriii, vivekguptakota, Meenakshi.g, shashikant_chauhan, GoZ, ifrik, Manuel Garcia, Neograph734: Modal popups in views is not showing properly when toolbar tray is upon modal"

This reverts commit 3257ff16.

Issue #3030363 by andrewmacpherson, Krzysztof Domański: Add test to assert ajax buttons are operable with the spacebar key

Issue #3053129 by R.shaikh, idebr: Links to twig.sensiolabs.org are redirects: replace with its destination URLs 1.x version

Issue #3052971 by alexpott, l.grube: Notice: Undefined index: #include_fallback in Drupal\Core\Render\Element\StatusMessages::generatePlaceholder()

Issue #3034599 by heddn, jian he, alexpott: PHP 7.0 got error: Undefined class constant 'SOURCE_IDS_HASH'

Issue #3001299 by seanB, joseph.olstad, damondt, amateescu: Error Loading Language Not Translated For Current Revision

Issue #3042124 by gabesullice, Wim Leers, logickal, benjy, Grimreaper: [regression] Empty response body when user is an administrator and an exception is thrown; some traces cannot be encoded because of recursion detection

Issue #3024460 by quietone, Gábor Hojtsy, masipila, heddn: Migrate D7 comment type language settings

Issue #2884052 by zviryatko, Krzysztof Domański, alexpott, drclaw, vijaycs85, Madis, charlotte.b, mcdruid, Berdir, lauriii: Uploading a managed file on a custom form that allows multiple files also triggers the remove button which results in a duplicate temporary record and results in the file being deleted

Issue #3054392 by iuana, joachim: protected methods in LocalAwareRedirectResponseTrait are missing docs

Issue #3040166 follow-up by Lendude: mkdir() fails in BrowserHtmlDebugTrait.php:141 because of a race condition

Issue #3052271 by amateescu, catch, mikelutz, alexpott, xaqrox, jimik42, plach, phenaproxima, rfmarcelino, mzvaan: media_library_update_8701() fails during update from 8.6.15 to 8.7.0

Issue #3052272 by mikelutz: Remove entityManager use in EntityKernelTestBase and all tests which extend it