fixup: run type-checks in Svelte 3

Author: mcous

.github/workflows/release.yml

@@ -33,7 +33,8 @@ jobs:
         include:
           # We only need to lint once, so do it on latest Node and Svelte
           - { node: '20', svelte: '4', check: 'lint' }
-          # `SvelteComponent` is not generic in Svelte 3, so type-checking only passes in >= 4
+          # Run type checks in latest node
+          - { node: '20', svelte: '3', check: 'types:legacy' }
           - { node: '20', svelte: '4', check: 'types:legacy' }
           - { node: '20', svelte: '5', check: 'types' }
           # Only run Svelte 5 checks on latest Node