fixup! Replace error-prone instanceof in Rules classes

Author: zonuexe

src/Rules/TooWideTypehints/TooWideMethodReturnTypehintRule.php

@@ -82,9 +82,9 @@ public function processNode(Node $node, Scope $scope): array
 
 		$returnType = TypeCombinator::union(...$returnTypes);
 		if (
-			!$isFirstDeclaration
-			&& !$method->isPrivate()
+			!$method->isPrivate()
 			&& ($returnType->isNull()->yes() || $returnType->isTrue()->yes() || $returnType->isFalse()->yes())
+			&& !$isFirstDeclaration
 		) {
 			return [];
 		}