[CI] PHP CS Fixer it up (#63)

Author: bocharsky-bw

src/SassBinary.php

@@ -23,7 +23,7 @@ public function __construct(
         private string $binaryDownloadDir,
         private ?string $binaryPath = null,
         private ?SymfonyStyle $output = null,
-        HttpClientInterface $httpClient = null
+        ?HttpClientInterface $httpClient = null
     ) {
         $this->httpClient = $httpClient ?? HttpClient::create();
     }