fixed typo RE: #139

Simple fix for STDIN #139 issue

Author: Lewiscowles1986

src/Bigcommerce/Api/Connection.php

@@ -442,7 +442,6 @@ public function put($url, $body)
         curl_exec($this->curl);
 
         fclose($handle);
-        curl_setopt($this->curl, CURLOPT_INFILE, STDIN);
 
         return $this->handleResponse();
     }