use hash sourcemap in karma conf (close #39)
use hash sourcemap in karma conf (close #39)

jveljan/webpack,jveljan/webpack,Toilal/vue-webpack-template,neonblack-at/webpack,vuejs-templates/webpack,jmv-team/jmv-cli,twcapps/vue-typescript-boilerplate,twcapps/vue-typescript-boilerplate,vuejs-templates/webpack,Brandon-Stoyles/webpack,twcapps/vue-typescript-boilerplate,jveljan/webpack,jmv-team/jmv-cli,jmv-team/jmv-cli,bbrietzke/webpack,vuejs-templates/webpack,pronebel/webpack,Toilal/vue-webpack-template,bbrietzke/webpack,Brandon-Stoyles/webpack,pronebel/webpack,neonblack-at/webpack,Toilal/vue-webpack-template,neonblack-at/webpack,pronebel/webpack,twcapps/vue-typescript-boilerplate,Toilal/vue-webpack-template,bbrietzke/webpack,Brandon-Stoyles/webpack