3.0.3

This release includes the following bug fixes and enhancements:

#81 - bug - No binding for OnAuthRefreshSuccess event
#86 - bug - The keycloak-auth-guard.ts does not work with implicit flow and "check-sso" option
#94 - enhancement - Keycloak-js errors silenced
-- enhancement - keycloak-js update to the latest release 4.4.0.
-- enhancement - code refactor on KeycloakService and keycloak-heroes example.