Update node versions for travis builds:
Update node versions for travis builds:

k88hudson/react-stub-context,karlbright/react-stub-context,bdsabian/react-stub-context,besarthoxhaj/react-stub-context,besarthoxhaj/react-stub-context,bdsabian/react-stub-context,k88hudson/react-stub-context,karlbright/react-stub-context