chore(package): update karma-chrome-launcher to version 3.1.0

Closes #49

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "hoek": "^5.0.3",
     "karma": "^2.0.5",
     "karma-chai": "^0.1.0",
-    "karma-chrome-launcher": "^2.2.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-mocha": "^1.3.0",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^3.0.0",