chore(package): update karma to version 5.0.5

Closes #10

Author: greenkeeper[bot]

package.json

@@ -57,7 +57,7 @@
     "cross-env": "^5.0.5",
     "dedupe": "^3.0.1",
     "eslint": "^5.16.0",
-    "karma": "^4.1.0",
+    "karma": "^5.0.5",
     "karma-browserify": "^6.0.0",
     "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0.4",