update license attribute
update license attribute

specifying the type and URL is deprecated:

https://docs.npmjs.com/files/package.json#license
http://npm1k.org/
azakhary/source-map,modulexcite/source-map,garysye/source-map,azakhary/source-map,webcoding/source-map,garysye/source-map,webcoding/source-map,modulexcite/source-map