WooCommerce Recommendation Engine 3.4.4

* WC and WP Updates.
* Update: Do not drop the recommendations table when the plugin is deactivated. This will allow the plugin to pick up where it left off when reactivated.

* WC and WP Updates.
* Update: Do not drop the session table when the plugin is deactivated. This will allow the plugin to pick up where it left off when reactivated.

3.4.2