Changes in version 3.5.4 are:
 * Support the xdg:schema attribute on secret items
 * Update to newer glib dependency and remove redundant code
 * Encode passwords correctly for gpg2 in the gpg-agent
 * Fix types of the DBus Created and Modified properties
 * Expose the 'session' and 'login' keyrings as aliases
 * Emit Secret Service signals when collections/items change
 * Fix some spurious warnings
 * Testing fixes