Dependency on core update module pulls in update_notifications_disable-update module

Evercurrent sets a dependency on the Update module. But a `composer install` pulls in the update_notifications_disable-update module instead. If this module gets enabled, it overrides the core Update module and some functions that Evercurrent relies on in the Update module are no longer available. The patches that follow change the evercurrent.info file's dependency by specifying the core Update module.