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

Closes #63

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "jquery": "^3.4.1",
     "json-loader": "0.5.7",
     "karma": "^4.1.0",
-    "karma-chrome-launcher": "^2.2.0",
+    "karma-chrome-launcher": "^3.1.0",
     "karma-jasmine": "^2.0.1",
     "karma-webpack": "^3.0.5",
     "mini-css-extract-plugin": "^0.6.0",