message: prefer arrow functions
diff: @@ -29,6 +29,7 @@ module.exports = {
  "no-cond-assign" : ["error", "always"],
  "indent": "off",
  "no-var": "error",
  + "prefer-arrow-callback": "error",
  "@typescript-eslint/indent": [ "error", "tab", { "SwitchCase": 1 } ],
  "@typescript-eslint/explicit-member-accessibility": "off",
  "@typescript-eslint/explicit-function-return-type" : "off",
  