Update license attribute
Update license attribute

specifying the type and URL is deprecated:

https://docs.npmjs.com/files/package.json#license
http://npm1k.org/
lbn/docco,MaxwellRebo/docco,jrvidal/docco,mhkeller/docco,lbn/docco,robertmackenzie/docco,jalleyne/docco,gvithellyna/docco,osharim/docco,robertmackenzie/docco,mhkeller/docco,whitetrefoil/docco,tbremer/docco,lobrien/docco,oponder/docco,whitetrefoil/docco,oponder/docco,ShawnHuang/docco-multidir,jalleyne/docco,osharim/docco,lobrien/docco,jrvidal/docco,DoomHammer/docco,Hellyna/docco,DoomHammer/docco,gvithellyna/docco,MaxwellRebo/docco,ShawnHuang/docco-multidir,Hellyna/docco,tbremer/docco