chore(package): update eslint to version 2.9.0
chore(package): update eslint to version 2.9.0

https://greenkeeper.io/
LinusU/standard,LinusU/standard,standard/standard,feross/standard,JedWatson/happiness,SimenB/standard,standard/standard,feross/standard,SimenB/standard,JedWatson/happiness,jasonpincin/standard