feat: version 2 beta

types/common.ts

@@ -0,0 +1,32 @@
+/**
+ * Represents an empty object.
+ */
+export type Empty = Record<string, never>;
+
+/**
+ * Represent an unknown object.
+ */
+export type Unknown = Record<string, unknown>;
+
+/**
+ * Represents a subscription that exposes a way to unsubscribe.
+ *
+ * @example
+ *
+ * ```ts
+ * function subscribe(): Subscription {
+ *   const interval = setInterval(() => console.log("foo"), 1000);
+ *   return {
+ *     unsubscribe() {
+ *       clearInterval(interval);
+ *     }
+ *   }
+ * }
+ * ```
+ */
+export type Subscription = {
+  /**
+   * Gracefully terminate a decoupled subscriber.
+   */
+  unsubscribe: () => void;
+};