message: Update frontend linter name to ESLint
diff: @@ -14,7 +14,7 @@ The minimum requirements for code contributions are:
  1. The code _must_ be compliant with the
  [JS Standard Code Style rules](http://standardjs.com) or their
  - correspondingly configured TSLint rules.
  + correspondingly configured ESLint rules.
  2. All new and changed code _should_ have a corresponding unit and/or
  integration test.
  3. New and changed challenges _must_ have a corresponding e2e test.
  