Travis config : Update to gafferDependencies 0.22.0.0.
Travis config : Update to gafferDependencies 0.22.0.0.

This is needed for Cortex 9.6.0, which supports procedurals without bounds.

lucienfostier/gaffer,lucienfostier/gaffer,hradec/gaffer,appleseedhq/gaffer,hradec/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,hradec/gaffer,boberfly/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,chippey/gaffer,boberfly/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,hradec/gaffer,appleseedhq/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,boberfly/gaffer,ivanimanishi/gaffer,GafferHQ/gaffer,appleseedhq/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,chippey/gaffer,hradec/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,ImageEngine/gaffer,chippey/gaffer,lucienfostier/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,boberfly/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,chippey/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer