Issue #3207968 by quietone, longwave, Spokje: Replace @codingStandards comments with phpcs: comments
Issue #3156944 by alexpott, Gábor Hojtsy, Charlie ChX Negyesi: Support nullable typehints and return types in ProxyBuilder and as a result support PHP 8
Issue #2408371 by dawehner, Fabianx, alexpott, bforchhammer: Proxies of module interfaces don't work