release 0.1.3

What's Changed

1. Add Sync + 'static trait bound for schedule.
2. Add a dynamic builder api for schedule.
3. Add a Never schedule.
4. Use IntoSchedule to compose。

Full Changelog: 0.1.2...0.1.3

release 0.1.2

1. Make the async wrapper running in a future, and stop by signal.
2. Add a throttling wrapper.
3. Impl schedule for AsMut<dyn Schedule>.
4. Fix time_mod's mod 0 bug.

Release 0.1.1

1. Rename some types and functions
2. Add combinator Then
3. More tests
4. An async runner implementation

release 0.1.0

release 0.1.0