chore(node): update karma to 2.0.0

Author: Narretz

package.json

@@ -61,7 +61,7 @@
     "jasmine-node": "^2.0.0",
     "jasmine-reporters": "^2.2.0",
     "jquery": "^3.2.1",
-    "karma": "^1.7.0",
+    "karma": "^2.0.0",
     "karma-browserstack-launcher": "^1.2.0",
     "karma-chrome-launcher": "^2.1.1",
     "karma-firefox-launcher": "^1.0.1",