fix type check

Author: dummdidumm

packages/svelte/tsconfig.json

@@ -25,6 +25,7 @@
 			"svelte/motion": ["./src/motion/public.d.ts"],
 			"svelte/server": ["./src/server/index.d.ts"],
 			"svelte/store": ["./src/store/public.d.ts"],
+			"svelte/reactivity": ["./src/reactivity/index-client.js"],
 			"#compiler": ["./src/compiler/types/index.d.ts"],
 			"#client": ["./src/internal/client/types.d.ts"],
 			"#server": ["./src/internal/server/types.d.ts"],