New upstream version 4.18.0

.github/workflows/main.yml

CHANGELOG.md

grammar/php5.y

grammar/php7.y

lib/PhpParser/NodeVisitor/NameResolver.php

lib/PhpParser/Parser/Php5.php

lib/PhpParser/Parser/Php7.php

lib/PhpParser/ParserFactory.php

test/PhpParser/NodeVisitor/NameResolverTest.php

test/PhpParser/ParserFactoryTest.php

test/code/parser/errorHandling/recovery.test