Fix php 8.4 compatible code on BitwiseFlagCleaner (#266)

* Fix php 8.4 compatible code BitwiseFlagCleaner

ref https://github.com/rectorphp/rector/pull/8990/files#diff-6a4a6fe9ef9b7755c813ac48865f8dd16de0bff4ff4140b9f707b3ffa8e81e58

* [ci-review] Rector Rectify

---------

Co-authored-by: GitHub Action <[email protected]>

Author: samsonasik

rules/DowngradePhp72/NodeManipulator/BitwiseFlagCleaner.php

@@ -18,7 +18,7 @@ public function __construct(
     ) {
     }
 
-    public function cleanFuncCall(FuncCall $funcCall, BitwiseOr $bitwiseOr, string $flag, Expr $expr = null): void
+    public function cleanFuncCall(FuncCall $funcCall, BitwiseOr $bitwiseOr, string $flag, ?Expr $expr = null): void
     {
         if ($bitwiseOr->left instanceof BitwiseOr) {
             /** @var BitwiseOr $leftLeft */

src/PhpDocDecorator/PhpDocFromTypeDeclarationDecorator.php

@@ -63,7 +63,7 @@ public function __construct(
 
     public function decorateReturn(ClassMethod|Function_|Closure|ArrowFunction $functionLike): void
     {
-        if ($functionLike->returnType === null) {
+        if (! $functionLike->returnType instanceof Node) {
             return;
         }
 
@@ -159,7 +159,7 @@ public function decorateReturnWithSpecificType(
         ClassMethod|Function_|Closure|ArrowFunction $functionLike,
         Type $requireType
     ): bool {
-        if ($functionLike->returnType === null) {
+        if (! $functionLike->returnType instanceof Node) {
             return false;
         }