fix: export types

src/index.ts

@@ -1,11 +1,13 @@
-import { RLNInstance } from "./rln";
+import type { MembershipKey, RateLimitProof, RLNInstance } from "./rln.js";
 
 // reexport the create function, dynamically imported from rln.ts
 export async function create(): Promise<RLNInstance> {
   // A dependency graph that contains any wasm must all be imported
   // asynchronously. This file does the single async import, so
   // that no one else needs to worry about it again.
-  const rlnModule = await import("./rln");
+  const rlnModule = await import("./rln.js");
 
   return await rlnModule.create();
 }
+
+export { RLNInstance, MembershipKey, RateLimitProof };