chore(package): update coveralls to version 2.11.12
chore(package): update coveralls to version 2.11.12

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