Update ExchangeAutodiscover.php
Update ExchangeAutodiscover.php

I've faced a problem in the function (class : src/API/ExchangeAutodiscover.php):
protected function parseVersionAfter2013($majorVersion, $minorVersion, $buildVersion)
{
if ($minorVersion >= 1) {
return ExchangeWebServices::VERSION_2016;
}

return $buildVersion == 847 ? ExchangeWebServices::VERSION_2013_SP1 : ExchangeWebServices::VERSION_2013;
}`
It seems that not only build 847 is version SP1 but version SP1 and UPPER according to build history versions :
https://technet.microsoft.com/fr-fr/library/hh135098(v=exchg.150).aspx#Exchange%20Server%C2%A02013

So the correct code must be :
$buildVersion >= 847 ? ExchangeWebServices::VERSION_2013_SP1 : ExchangeWebServices::VERSION_2013; }
Garethp/php-ews