add more eslint-config-wikimedia rules. apply autofixes

wikimedia-gadgets / afc-helper

A tool for reviewing Articles for Creation submissions on the English Wikipedia

https://en.wikipedia.org/wiki/Wikipedia:AFCH

GNU General Public License v3.0

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Closed NovemLinguae closed 3 months ago

NovemLinguae commented 3 months ago

Why

Running old JS code through the mediawiki linter improves code quality and maintainability
We can fully embrace ES6 now. The MediaWiki/Wikimedia compatibility policy allows it. We don't need to limit ourselves to ES5.

What

add more eslint-config-wikimedia rules
apply autofixes
set un-autofixed errors to warn or off
add server.js to .eslintignore since I couldn't figure out how to handle that error