Update karma from 3.1.1 to 3.1.3

Author: dependencies-bot

packages/generator/app/templates/package.json

@@ -56,7 +56,7 @@
     "enzyme": "3.7.0",
     "enzyme-adapter-react-16": "1.7.0",
     "eslint": "5.9.0",
-    "karma": "3.1.1",
+    "karma": "3.1.3",
     "karma-chai-plugins": "0.9.0",
     "karma-electron-launcher": "0.2.0",
     "karma-mocha": "1.3.0",