Travis CI build: try to also cache .sbt/launchers
Travis CI build: try to also cache .sbt/launchers

orbeon/orbeon-forms,brunobuzzi/orbeon-forms,brunobuzzi/orbeon-forms,orbeon/orbeon-forms,orbeon/orbeon-forms,brunobuzzi/orbeon-forms,orbeon/orbeon-forms,brunobuzzi/orbeon-forms