Plugin latest version throwing a lot of warnings due to WP compatibility

[spreadzz]

Hello,

My websites error log gets filled with warnings from the plugin with this error. Seems like a easy fix.

[proxy_fcgi:error] [pid 2714408:tid 140712162678528] [client 174.204.82.88:2059] AH01071: Got error 'PHP message: PHP Warning: Declaration of WCSG_Query::get_endpoint_title($endpoint) should be compatible with WC_Query::get_endpoint_title($endpoint, $action = '') in /var/www/website.com/wp-content/plugins/woocommerce-subscriptions-gifting/includes/class-wcsg-query.php on line 61

[phillipcornwell]

This looks related to #374