fixed the npm version requirement
fixed the npm version requirement

There is no `npm v2.12.` yet =)
gvn/webmaker-android,bolaram/webmaker-android,alicoding/webmaker-android,mozilla/webmaker-android,alanmoo/webmaker-android,j796160836/webmaker-android,k88hudson/webmaker-android,bolaram/webmaker-android,mozilla/webmaker-android,alicoding/webmaker-android,gvn/webmaker-android,j796160836/webmaker-android,rodmoreno/webmaker-android,alanmoo/webmaker-android,rodmoreno/webmaker-android,k88hudson/webmaker-android