update dpointer dependency to 0.3.0-alpha
update dpointer dependency to 0.3.0-alpha

tkrugg/deliteful,brunano21/deliteful,EAlexRojas/deliteful,harbalk/deliteful,cjolif/deliteful,brunano21/deliteful,tkrugg/deliteful,cjolif/deliteful,kitsonk/deliteful,kitsonk/deliteful,harbalk/deliteful,EAlexRojas/deliteful