update caf and update usage

Author: MartinMalinda

package-lock.json

@@ -40,7 +40,7 @@
   "homepage": "https://vue-concurrency.netlify.app/",
   "license": "MIT",
   "dependencies": {
-    "caf": "13.1.1"
+    "caf": "15.0.1"
   },
   "devDependencies": {
     "@testing-library/dom": "^7.24.3",

package.json

@@ -6,9 +6,7 @@ import {
   onFulfilled,
   onRejected,
 } from "./types/index";
-
-// https://github.com/MartinMalinda/vue-concurrency/issues/58
-const CAF = require('caf/caf');
+import CAF from 'caf';
 
 export type TaskInstanceStatus =
   | "running"
@@ -180,7 +178,7 @@ function runTaskInstance<T>(
   options: TaskInstanceOptions
 ): void {
   const token = new (CAF as any).cancelToken();
-  const cancelable = (CAF as any)(cb, token);
+  const cancelable = (CAF as any)(cb);
   taskInstance.token = token;
 
   taskInstance.hasStarted = true;