Updated development dependencies to make it 1.9.3 compatible
Updated development dependencies to make it 1.9.3 compatible

roberttaraya/acts_as_shopping_cart,kulte/acts_as_shopping_cart,roberttaraya/acts_as_shopping_cart,eubanksanator/acts_as_shopping_cart,crowdint/acts_as_shopping_cart,dabit/acts_as_shopping_cart,dabit/acts_as_shopping_cart,kulte/acts_as_shopping_cart,crowdint/acts_as_shopping_cart,eubanksanator/acts_as_shopping_cart