chore: execute `svelte/experimental-require-slot-types` only on Svelte 3 and 4#1005

baseballyama wants to merge 2 commits intomainsveltejs/eslint-plugin-svelte:mainfrom

chore/experimental-require-slot-typessveltejs/eslint-plugin-svelte:chore/experimental-require-slot-typesCopy head branch name to clipboard