fix(TEN-738): set escapeCharacter property to prevent uncaught type e…

…rror

Argument 1 passed to League\Csv\AbstractCsv::setEscape() must be of the type string, null given

src/Streamer/FileCsv.php

@@ -67,6 +67,7 @@ public function __construct(
         $this->log = $log;
         $this->headers = $headers;
         $this->delimiter = $delimiter;
+        $this->escapeCharacter = $escapeCharacter;
     }
 
     /**