Issue #2915036 by ndf, Dane Powell, tim.plunkett, Lendude, jofitz, koppie, larowlan, fubarhouse, sime, alex.skrypnyk, Joseph Zhao: Display mode configurations don't get updated with new fields

Issue #3044261 by Joseph Zhao, cilefen, tstoeckler, Pancho, gnindl: Update CLDR codes in CountryManager.php to latest data (35.1.0)

Issue #2363987 by Joseph Zhao, mr.baileys, Krzysztof Domański, acrosman, andypost, catch, lauriii: Add theme support for content of 401/403/404 responses

Issue #2891754 by alexpott, samuel.mortenson, Joseph Zhao, Xano, Berdir, plach, vijaycs85: [regression] UserMailRequiredValidator fails on new user entities

Issue #3044749 by amateescu, plach, Joseph Zhao: Drupal Core Update (8.7.0-beta1) - the "workspace" plugin does not exist

Issue #3039287 by bendeguz.csirmaz, effulgentsia, xjm, alexpott, catch, jibran, hampercm, tedbow, Joseph Zhao, dawehner: Implement changes required to remove support for PHP 5.5 and 5.6

Issue #3039408 by vijaycs85, WidgetsBurritos, alexpott, phenaproxima, Joseph Zhao, tstoeckler, kfritsche, mikelutz, fabpot: Updating twig/twig to v1.38.0 or v1.38.1 causes fatal error