Merge pull request #150 from neo4j-php/149-unlink

Suppress unlink warning

Author: stefanak-michal

src/Bolt.php

@@ -82,7 +82,7 @@ private function track(): void
                 ]);
 
                 if (curl_exec($curl) !== false) {
-                    unlink($file);
+                    @unlink($file);
                 }
                 curl_close($curl);
             }