Bump MODULE_VERSION to 5.1.1
Bump MODULE_VERSION to 5.1.1

Change-Id: I76871708e861efc18786f12ac1bcd6156003e875
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@digia.com>

kobolabs/qtgraphicaleffects