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

Closes #8

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
     "istanbul": "^0.4.0",
     "jasmine": "^2.5.2",
     "karma": "^1.3.0",
-    "karma-chrome-launcher": "^2.0.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-coverage": "^1.1.1",
     "karma-firefox-launcher": "^1.0.0",
     "karma-ie-launcher": "^1.0.0",