chore(package): update openlayers to version 3.13.1
chore(package): update openlayers to version 3.13.1

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