curl_reset not defined on PHP < 5.5

[xaviermartinez2012]

As noted in the PHP manual, the curl_reset function
(found in ./vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php line 78)
is not defined in PHP < 5.5, resulting in a fatal error when running:
$response = $mj->post(Resources::$Email, ['body' => $body]).