move karma configuration file to config directory

config/karma.conf.js

@@ -5,7 +5,7 @@ module.exports = function (config) {
   config.set({
 
     // base path that will be used to resolve all patterns (eg. files, exclude)
-    basePath: '',
+    basePath: '..',
 
     plugins: [
       'karma-remap-istanbul',

package.json

@@ -38,7 +38,7 @@
     "start:watch": "run-p build:js:watch start:server",
     "start:server": "node scripts/server.js",
     "test": "npm-run-all -s lint build test:spec",
-    "test:spec": "karma start karma.conf.js",
+    "test:spec": "karma start config/karma.conf.js",
     "translations": "node scripts/update_locales.js"
   },
   "dependencies": {