Update karma to the latest version 🚀 (#146)

* chore(package): update karma to version 2.0.0

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
         "husky": "^0.14.3",
         "jasmine-core": "^2.8.0",
         "js-yaml": "^3.10.0",
-        "karma": "^1.7.1",
+        "karma": "^2.0.0",
         "karma-browserstack-launcher": "^1.3.0",
         "karma-coverage": "^1.1.1",
         "karma-jasmine": "^1.1.1",