chore(package): update eslint to version 2.12.0
chore(package): update eslint to version 2.12.0

https://greenkeeper.io/
pgiraud/ngeo,adube/ngeo,camptocamp/ngeo,ger-benjamin/ngeo,pgiraud/ngeo,adube/ngeo,camptocamp/ngeo,Jenselme/ngeo,camptocamp/ngeo,camptocamp/ngeo,ger-benjamin/ngeo,kalbermattenm/ngeo,kalbermattenm/ngeo,Jenselme/ngeo,Jenselme/ngeo,camptocamp/ngeo,Jenselme/ngeo,ger-benjamin/ngeo,adube/ngeo,pgiraud/ngeo,kalbermattenm/ngeo,adube/ngeo