Fix too wide bool in trivial methods

Author: staabm

src/Rules/TooWideTypehints/TooWideTypeCheck.php

@@ -176,6 +176,9 @@ public function checkFunctionReturnType(
 		if (count($returnStatements) === 0) {
 			return [];
 		}
+		if (count($returnStatements) === 1 && $nativeFunctionReturnType->isBoolean()->yes()) {
+			return [];
+		}
 
 		$returnTypes = [];
 		foreach ($returnStatements as $returnStatement) {

tests/PHPStan/Rules/TooWideTypehints/TooWideFunctionReturnTypehintRuleTest.php

@@ -78,18 +78,6 @@ public function testBug13384cPhp82(): void
 		$this->reportTooWideBool = true;
 		$this->reportNestedTooWideType = true;
 		$this->analyse([__DIR__ . '/data/bug-13384c.php'], [
-			[
-				'Function Bug13384c\doFoo() never returns true so the return type can be changed to false.',
-				5,
-			],
-			[
-				'Function Bug13384c\doFoo2() never returns false so the return type can be changed to true.',
-				9,
-			],
-			[
-				'Function Bug13384c\doFooPhpdoc() never returns false so the return type can be changed to true.',
-				93,
-			],
 			[
 				'Function Bug13384c\doFooPhpdoc2() never returns true so the return type can be changed to false.',
 				100,

tests/PHPStan/Rules/TooWideTypehints/TooWideMethodReturnTypehintRuleTest.php

@@ -231,26 +231,10 @@ public function testBug13384c(): void
 		$this->reportTooWideBool = true;
 		$this->reportNestedTooWideType = true;
 		$this->analyse([__DIR__ . '/data/bug-13384c.php'], [
-			[
-				'Method Bug13384c\Bug13384c::doBar() never returns true so the return type can be changed to false.',
-				33,
-			],
-			[
-				'Method Bug13384c\Bug13384c::doBar2() never returns false so the return type can be changed to true.',
-				37,
-			],
 			[
 				'Method Bug13384c\Bug13384c::doBarPhpdoc() never returns false so the return type can be changed to true.',
 				55,
 			],
-			[
-				'Method Bug13384c\Bug13384Static::doBar() never returns true so the return type can be changed to false.',
-				62,
-			],
-			[
-				'Method Bug13384c\Bug13384Static::doBar2() never returns false so the return type can be changed to true.',
-				66,
-			],
 			[
 				'Method Bug13384c\Bug13384Static::doBarPhpdoc() never returns false so the return type can be changed to true.',
 				84,