Merge branch '6.4' into 7.0

* 6.4:
  Fix CI
  Bump ext-redis in CI on PHP >= 8.4
  Adjust pretty name of closures on PHP 8.4
  implement NodeVisitorInterface instead of extending AbstractNodeVisitor
  sync .github/expected-missing-return-types.diff
  skip test assertions that are no longer valid with PHP >= 8.2.18/8.3.5

Author: nicolas-grekas

Caster/ReflectionCaster.php

@@ -42,7 +42,7 @@ public static function castClosure(\Closure $c, array $a, Stub $stub, bool $isNe
 
         $a = static::castFunctionAbstract($c, $a, $stub, $isNested, $filter);
 
-        if (!str_contains($c->name, '{closure}')) {
+        if (!str_contains($c->name, '{closure')) {
             $stub->class = isset($a[$prefix.'class']) ? $a[$prefix.'class']->value.'::'.$c->name : $c->name;
             unset($a[$prefix.'class']);
         }