Currently, wikidata-query-gui uses the same eslint/jshint configuration for the main source code and the tests. This is annoying, because it means we can’t use arrow functions, async/await, etc. in the tests, even though those tests will only run on Node.js versions that have support for these features. It would be nice to split up the config, so that we still require “conservative” JavaScript for the main source code, but allow more modern code in the tests.

It’s probably also a good idea to check why we’re combining eslint and jshint.

This came up in the context of T291467.