[DowngradePhp71] Apply DowngradeIterablePseudoTypeDeclarationRector o…

…n closures as well (#6662) (#760)

Co-authored-by: Bobab12 <bobab12@users.noreply.github.com>

rules-tests/DowngradePhp71/Rector/FunctionLike/DowngradeIterablePseudoTypeDeclarationRector/Fixture/closure_iterable.php.inc

@@ -0,0 +1,31 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp71\Rector\FunctionLike\DowngradeIterablePseudoTypeDeclarationRector\Fixture;
+
+final class ClosureIterable
+{
+    public function run()
+    {
+        return function (): iterable {
+            return [];
+        };
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp71\Rector\FunctionLike\DowngradeIterablePseudoTypeDeclarationRector\Fixture;
+
+final class ClosureIterable
+{
+    public function run()
+    {
+        return function () {
+            return [];
+        };
+    }
+}
+
+?>

rules/DowngradePhp71/Rector/FunctionLike/DowngradeIterablePseudoTypeDeclarationRector.php

@@ -5,6 +5,7 @@
 namespace Rector\DowngradePhp71\Rector\FunctionLike;
 
 use PhpParser\Node;
+use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Function_;
 use PHPStan\Type\IterableType;
@@ -31,7 +32,7 @@ public function __construct(
      */
     public function getNodeTypes(): array
     {
-        return [Function_::class, ClassMethod::class];
+        return [Function_::class, ClassMethod::class, Closure::class];
     }
 
     public function getRuleDefinition(): RuleDefinition
@@ -69,7 +70,7 @@ public function run($iterator)
     }
 
     /**
-     * @param Function_|ClassMethod $node
+     * @param Function_|ClassMethod|Closure $node
      */
     public function refactor(Node $node): ?Node
     {