chore(package): update karma to version 5.0.4

Closes #97

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
     "jasmine-node": "^1.14.5",
     "jshint": "^2.9.1",
     "jshint-stylish": "^2.1.0",
-    "karma": "~1.7.1",
+    "karma": "~5.0.4",
     "karma-coverage": "^1.1.1",
     "karma-jasmine": "^1.1.0",
     "karma-phantomjs-launcher": "^1.0.0",