chore(package): update d3 to version 3.5.15
chore(package): update d3 to version 3.5.15

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