chore(package): update proj4 to version 2.4.1
chore(package): update proj4 to version 2.4.1

https://greenkeeper.io/
Jenselme/ngeo,adube/ngeo,camptocamp/ngeo,Jenselme/ngeo,adube/ngeo,Jenselme/ngeo,camptocamp/ngeo,camptocamp/ngeo,camptocamp/ngeo,Jenselme/ngeo,adube/ngeo,camptocamp/ngeo,adube/ngeo