V3 Docs :: Fix "unshirtAsync" typo (#1712)

lib/queue.js

@@ -29,7 +29,7 @@ import wrapAsync from './internal/wrapAsync';
  * Invoke with `queue.unshift(task, [callback])`.
  * @property {AsyncFunction} pushAsync - the same as `q.push`, except this returns
  * a promise that rejects if an error occurs.
- * @property {AsyncFunction} unshirtAsync - the same as `q.unshift`, except this returns
+ * @property {AsyncFunction} unshiftAsync - the same as `q.unshift`, except this returns
  * a promise that rejects if an error occurs.
  * @property {Function} remove - remove items from the queue that match a test
  * function.  The test function will be passed an object with a `data` property,