Remove "ecmaVersion": 8 from .eslintrc.json?

[NilsEnevoldsen]

I think this extension isn't supposed to use features beyond ES3 in order to be compatible with ResourceLoader. https://phabricator.wikimedia.org/T75714

ScryfallLinks/.eslintrc.json

Lines 11 to 13 in 92d72d2

	"parserOptions": {
	"ecmaVersion": 8
	}

I used a higher version because I didn't know better and it appears to work. I'm going to wontfix this issue, but keep it open for informational purposes, or in case some contributor is ambitious.

[Aspallar]

I would agree with the wontfix - the ES3 limitation appears to only apply to js in a wiki's Common.js and in users personal js pages. So the only reason to re-code to ES3 would be to support Internet Explorer 11, a dying browser.