chore(package): update eslint to version 3.0.0
chore(package): update eslint to version 3.0.0

https://greenkeeper.io/
mozilla/web-ext,kumar303/web-ext,shubheksha/web-ext,rpl/web-ext,mozilla/web-ext,shubheksha/web-ext,kumar303/web-ext,rpl/web-ext