Fixed broken test suite

package.json

@@ -45,8 +45,10 @@
     "gulp-uglify": "^0.2.1",
     "jshint-stylish": "^0.2.0",
     "karma": "^0.12.16",
+    "karma-chrome-launcher": "^0.1.5",
     "karma-coverage": "^0.2.4",
     "karma-failed-reporter": "0.0.2",
+    "karma-firefox-launcher": "^0.1.3",
     "karma-jasmine": "~0.2.0",
     "karma-phantomjs-launcher": "~0.1.4",
     "karma-spec-reporter": "0.0.13",
@@ -54,6 +56,6 @@
   },
   "scripts": {
     "test": "gulp test",
-    "travis": "gulp --travis"
+    "travis": "gulp travis"
   }
 }