chore(package): update karma to version 2.0.0

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "coveralls": "^2.13.1",
     "jasmine-core": "^2.8.0",
     "jquery": "^3.2.1",
-    "karma": "^1.7.1",
+    "karma": "^2.0.0",
     "karma-browserify": "^5.1.1",
     "karma-coverage": "^1.1.1",
     "karma-jasmine": "^1.1.0",