Editor does not show lint errors in *.svelte files using eslint-plugin-svelte

[ildella]

As reported to the svelte plugin repo: https://github.com/sveltejs/eslint-plugin-svelte/issues/576

I can confirm that this Sublime + ESlint package + eslint-plugin-svelte is not showing errors or warnings.

Also confirm that with the old eslint-plugin-svelte3, Sublime was showing errors.