Added @phpstan-throws support

Author: kukulich

SlevomatCodingStandard/Helpers/Annotation/ThrowsAnnotation.php

@@ -8,6 +8,7 @@
 use PHPStan\PhpDocParser\Ast\Type\TypeNode;
 use PHPStan\PhpDocParser\Ast\Type\UnionTypeNode;
 use SlevomatCodingStandard\Helpers\AnnotationTypeHelper;
+use function in_array;
 use function sprintf;
 
 /**
@@ -21,7 +22,7 @@ class ThrowsAnnotation extends Annotation
 
 	public function __construct(string $name, int $startPointer, int $endPointer, ?string $content, ?ThrowsTagValueNode $contentNode)
 	{
-		if ($name !== '@throws') {
+		if (!in_array($name, ['@throws', '@phpstan-throws'], true)) {
 			throw new InvalidArgumentException(sprintf('Unsupported annotation %s.', $name));
 		}
 

SlevomatCodingStandard/Helpers/AnnotationHelper.php

@@ -297,6 +297,7 @@ public static function getAnnotations(File $phpcsFile, int $pointer): array
 					'@psalm-var' => VariableAnnotation::class,
 					'@phpstan-var' => VariableAnnotation::class,
 					'@throws' => ThrowsAnnotation::class,
+					'@phpstan-throws' => ThrowsAnnotation::class,
 					'@property' => PropertyAnnotation::class,
 					'@psalm-property' => PropertyAnnotation::class,
 					'@phpstan-property' => PropertyAnnotation::class,