update license attribute
update license attribute

specifying the type and URL is deprecated:

https://docs.npmjs.com/files/package.json#license
http://npm1k.org/
marian-r/curl,runt18/curl,djkost85/curl-1,djkost85/curl-1,jaredcacurak/curl,marian-r/curl,jaredcacurak/curl,dfd07d/curl,jaredcacurak/curl,runt18/curl,dfd07d/curl,dfd07d/curl,marian-r/curl,djkost85/curl-1,cujojs/curl,runt18/curl,cujojs/curl,cujojs/curl