travis: drop node 0.10, add 4.0
travis: drop node 0.10, add 4.0

JedWatson/happiness,reggi/standard,pombredanne/standard-1,standard/standard,SimenB/standard,JedWatson/happiness,jasonpincin/standard,standard/standard,koddsson/standard,LinusU/standard,LinusU/standard,SimenB/standard,mnquintana/standard,feross/standard,beni55/standard,feross/standard