Version 0.8.2
v0.8.2 New features:
1. Optimization logic: After task removal, the surviving task instance resources can be cancelled normally.
2. FIXED:
When the `TimeoutTask` event fails to remove the handle, Ok(()) is returned by default.
This causes the `TimeoutTask` event to be sent to the outside world by `status_report_sender`,Which is a buggy behavior.