Fix missing unsubscribe return on subscribeCollect

package.json

@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/utils",
-   "version": "2.2.17",
+   "version": "2.2.18",
    "description": "Different Utilities, that are not worth own packages",
    "main": "lib/index.js",
    "types": "lib/index.d.ts",

src/observable.ts

@@ -62,6 +62,8 @@ export default class Observable<T = any> {
 
       let oldcb = this.subscriberCollect.find((e) => e === callback);
       if (!oldcb) this.subscriberCollect.push(callback);
+
+      return () => this.unsubscribe(callback);
    }
 
    /**