chore(package): update karma to version 5.0.3

Closes #2378

Author: greenkeeper[bot]

package.json

@@ -84,7 +84,7 @@
     "glob-gitignore": "^1.0.14",
     "in-publish": "^2.0.1",
     "json-loader": "^0.5.7",
-    "karma": "^1.3.0",
+    "karma": "^5.0.3",
     "karma-chrome-launcher": "^1.0.1",
     "karma-firefox-launcher": "^1.3.0",
     "karma-mocha": "^1.3.0",