Issue #3100611 by amateescu, lauriii, dixon_, shaal, vijaycs85, huzooka: Improve the Workspaces toolbar UI for desktop and mobile

Revert "Issue #3087644 by jibran, Berdir, alexpott, longwave, Wim Leers, amateescu, catch, larowlan, dpi, quietone: Remove Drupal 8 updates up to and including 88**"

This reverts commit 136f0550.

Issue #3087644 by jibran, Berdir, alexpott, longwave, Wim Leers, amateescu, catch, larowlan, dpi, quietone: Remove Drupal 8 updates up to and including 88**

Issue #3106075 by Krzysztof Domański, heddn, Gábor Hojtsy, xjm, catch, mondrake, larowlan, greg.1.anderson: Bump minimum PHP for Drupal 9 to PHP 7.3

Issue #3058853 by hubaishan, jhmnieuwenhuis, x0r1x, daffie, xekon, andypost, qdelance, lamigo, jmonkfish: Drupal 8.x on Postgresql 12

Issue #3106654 by kiamlaluno: hook_toolbar() documentation still makes reference to toolbar_pre_render()

Issue #3104015 by TravisCarden, alexpott, longwave, Spokje, fgm, catch, xjm, Berdir, Bruno Vincent: Replace ZendFramework/* dependencies with their Laminas equivalents

Issue #3101547 by ravi.shankar, Gábor Hojtsy, tedbow, dww, lauriii: Clean up code documentation for display of core compatibility ranges for available module updates

Issue #2962978 by govind.maloo, msankhala, jonathanshaw: Remove PHP5.5 performance optimisations in Container::createService and PhpArrayContainer::createService

Issue #3092408 by ravi.shankar, govind.maloo, Chi, alexpott: Fix broken references in Field UI module

Issue #2145751 by jibran, yongt9412, DuaelFr, Berdir, pnagornyak, arpad.rozsa, mbovan, Wim Leers, Nixou, effulgentsia, Fabianx, kristiaanvandeneynde, anavarre, dawehner: Introduce ENTITY_TYPE_list:BUNDLE cache tag and add it to single bundle listing

Issue #3086850 by MasterBranch, ravi.shankar, joachim, hchonov, kiwimind, mglaman, jhedstrom: "Cannot load a NULL ID" assertion in EntityStorageBase should say the entity type

Issue #3104265 by longwave, catch, xjm, TravisCarden: Update Composer dependencies on Doctrine components in 9.0.x

Issue #2914110 by Berdir, neclimdul, acbramley, yongt9412, Wim Leers, arpad.rozsa, kim.pepper, Fabianx, davidwhthomas, pameeela, kualee, amateescu, jibran, longwave: Shortcut hook_toolbar implementation makes all pages uncacheable

Issue #3096203 by bnjmnm, xjm, lauriii: Create Classy library dependency tests that can be used for all themes, and verify by providing an Umami-specific classy/dropbutton

Issue #3096566 by huzooka, aleevas, Dinesh18, ravi.shankar, phenaproxima, lauriii: Copy media library styles from Seven to Claro

Issue #3105580 by Hardik_Patel_12, siddhant.bhosale: Move HTML classes from claro_preprocess_checkboxes to a template

Issue #2969262 by bkosborne, FeyP, BlacKICEUA, dawehner, joelpittet: PHP 7.2: Warning: count(): Parameter must be an array or an object that implements Countable n Drupal\views\Plugin\views\argument_validator\Entity->validateEntity()

Issue #3100470 by phenaproxima, oknate, Meenakshi.g, Wim Leers, bnjmnm: EditorMediaDialog triggers an "undefined index" notice for data-view-mode

Issue #3027998 by robpowell, jofitz, codekarate, heddn: Default Value Migration Process plugin produces unexpected behavior when updating list field from D7 to D8

Revert "Issue #3103031 by quietone, Wim Leers: Add missing test of field option translations for booleans"

This reverts commit 677f9d42.

Issue #3062101 by Krzysztof Domański, larowlan: Incorrect data type when the preg_match function is used as the result of another function

Issue #3101818 by eiriksm, ravi.shankar, longwave: Allow other loggers than core loggers to FieldDiscovery.php

Issue #3104420 by peterkokot, mondrake: PHP 7.4 Deprecated curly brace syntax for accessing array elements

Issue #2903831 by quicksketch, acbramley, Lendude, longwave, Mirroar, jibran: Views attachments missing for some display machine names

Issue #2851204 by swarad07, fotuzlab, Sahana _N, prash_98, anoopjohn, ravi.shankar, jungle, rahul.gore, cilefen, xjm, alexpott, jericho711: #size for Select field documentation is wrong

Issue #3104021 by abhisekmazumdar, Hardik_Patel_12: Remove the unnecessary by reference from menu_ui_system_breadcrumb_alter

Issue #3091447 by Krzysztof Domański, el7cosmos, longwave, ravi.shankar, Berdir, martin107: Remove Utility component BC layers

Issue #3102059 by alexpott, Berdir, longwave: Make tests of the update system use UpdatePathTestTrait instead of UpdatePathTestBase