Add 2.4.0 to travis matrix
Add 2.4.0 to travis matrix
puma/puma,respire/puma,puma/puma,eileencodes/puma,respire/puma,looker/puma,eileencodes/puma,looker/puma,looker/puma,unleashed/puma,looker/puma,eileencodes/puma,unleashed/puma,eileencodes/puma,unleashed/puma,respire/puma,unleashed/puma,puma/puma,respire/puma,puma/puma