Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2901739 by andriyun, Jo Fitzgerald, mfernea, xjm: Fix 'Squiz.Arrays.ArrayDeclaration' coding standard

Issue #2773185 by Wim Leers, effulgentsia, dawehner: Fix nits in \Drupal\rest\Entity\ConfigDependencies

Issue #2308745 by Alumei, dawehner, Wim Leers, larowlan, Arla, alexpott, g.oechsler, R.Muilwijk, Berdir, catch, klausi, clemens.tolboom, MattA, Crell: Remove rest.settings.yml, use rest_resource config entities