# Version 1.4.1
- Remove dependency on deprecated `vec-arena`. (#23)
# Version 1.4.0
- Add `Executor::is_empty()` and `LocalExecutor::is_empty()`.
# Version 1.3.0
- Parametrize executors over a lifetime to allow spawning non-`static` futures.
# Version 1.2.0
- Update `async-task` to v4.
# Version 1.1.1
- Replace `AtomicU64` with `AtomicUsize`.
# Version 1.1.0
- Use atomics to make `Executor::run()` and `Executor::tick()` futures `Send + Sync`.
# Version 1.0.0
- Stabilize.
# Version 0.2.1
- Add `try_tick()` and `tick()` methods.
# Version 0.2.0
- Redesign the whole API.
# Version 0.1.2
- Add the `Spawner` API.
# Version 0.1.1
- Initial version