chore(package): update html-webpack-plugin to version 2.24.1
chore(package): update html-webpack-plugin to version 2.24.1

https://greenkeeper.io/
c1rno/angelhack_frontend_prototype,c1rno/angelhack_frontend_prototype,mseemann/angular2-mdl,c1rno/angelhack_frontend_prototype,c1rno/angelhack_frontend_prototype,mseemann/angular2-mdl,mseemann/angular2-mdl,mseemann/angular2-mdl