update license attribute
update license attribute

specifying the type and URL is deprecated:

https://docs.npmjs.com/files/package.json#license
http://npm1k.org/
tkirda/when,SourcePointUSA/when,caporta/when,ning-github/when,anthonyvia/when,anthonyvia/when,caporta/when,stevage/when,mlennon3/when,tkirda/when,SourcePointUSA/when,ning-github/when,frank-weindel/when,stevage/when,frank-weindel/when,mlennon3/when