We've just released Keycloak 3.3.0.CR2.
There's not much here except a few bug fixes. We're still waiting for WildFly 11 Final to be release before we release Keycloak 3.3.0.Final.
To download the release go to the Keycloak homepage.
The full list of resolved issues is available in JIRA.
Before you upgrade remember to backup your database and check the migration guide. Release candidates are not recommended in production and we do not support upgrading from release candidates.