fix build

tests/IntegrationTest.php

@@ -13,14 +13,13 @@
 final class IntegrationTest extends PHPStanTestCase
 {
     // test all rules at once to make sure rule errors do not overlap
-    public function testE2E()
+    public function testE2E(): void
     {
         $errors = $this->runAnalyse(__DIR__ . '/data/e2e.php');
         static::assertCount(2, $errors);
 
         $this->assertSame('Expired on 2023-12-14: fix it.', $errors[0]->getMessage());
         $this->assertSame('"php" version requirement ">=7" satisfied.', $errors[1]->getMessage());
-
     }
 
     public static function getAdditionalConfigFiles(): array
@@ -41,6 +40,7 @@ private function runAnalyse(string $file, ?array $allAnalysedFiles = null): arra
         $analyser = self::getContainer()->getByType(Analyser::class);
         /** @var FileHelper $fileHelper */
         $fileHelper = self::getContainer()->getByType(FileHelper::class);
+        /** @phpstan-ignore-next-line missing bc promise */
         $errors = $analyser->analyse([$file], null, null, true, $allAnalysedFiles)->getErrors();
         foreach ($errors as $error) {
             $this->assertSame($fileHelper->normalizePath($file), $error->getFilePath());