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

Closes #581

Author: greenkeeper[bot]

package.json

@@ -142,7 +142,7 @@
     "istanbul-instrumenter-loader": "3.0.0",
     "json-loader": "^0.5.4",
     "karma": "^1.4.1",
-    "karma-chrome-launcher": "^2.0.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-coverage": "^1.1.1",
     "karma-jasmine": "^1.0.2",
     "karma-mocha-reporter": "^2.2.2",