Adding missing exports

src/index.ts

@@ -1,11 +1,17 @@
 import Lock, { Release } from "./lock.js";
+
 import Observable, {
    ObserverCallback,
    ObserverCallbackCollect,
    ObservableInterface,
 } from "./observable.js";
+
 import AwaitStore from "./awaiter.js";
 
+import AsyncIteratorFromCB from "./asynciter.js";
+
+import Signal from "./signal.js";
+
 export type {
    Release,
    ObserverCallback,
@@ -13,4 +19,4 @@ export type {
    ObservableInterface,
 };
 
-export { Lock, Observable, AwaitStore };
+export { Lock, Observable, AwaitStore, AsyncIteratorFromCB, Signal };