feat(client:karma): add karma-sourcemap-loader

Author: Awk34

templates/app/_package.json

@@ -209,6 +209,7 @@
     "karma-chrome-launcher": "^1.0.1",
     "karma-phantomjs-launcher": "~1.0.0",
     "karma-spec-reporter": "~0.0.20",
+    "karma-sourcemap-loader": "~0.3.7",
     "sinon-chai": "^2.8.0",
     "mocha": "^2.2.5",<% if(filters.mocha) { %>
     "karma-mocha": "^1.0.1",

templates/app/karma.conf.js

@@ -59,7 +59,8 @@ module.exports = function(config) {
       require('karma-spec-reporter'),
       require('karma-phantomjs-launcher'),
       require('karma-script-launcher'),
-      require('karma-webpack')
+      require('karma-webpack'),
+      require('karma-sourcemap-loader')
     ],
 
     // list of files / patterns to exclude