Task-level `postDelay` is never read, though the JSDoc deprecates `delay` in its favour

[Shinrai]

Problem

The task-level JSDoc and type definitions mark delay as deprecated in favour of postDelay, but enqueue() only reads delay (and start) on a task. Following the documented API by passing postDelay on a task gives no delay at all. Priority- and coalescing-level config do use postDelay/startDelay, so the task level is the odd one out.

Found while rewriting the README examples (#50), which now tells users that delay/start are the current task-level names.

Fix

Make enqueue() accept postDelay / startDelay on tasks, keep delay / start as deprecated aliases with the same deprecation warning the other levels emit, and make the JSDoc, types and README agree. Add tests for both names.

[cldmv-bot]

Marked status: implemented — resolved by #55, merged into next. This issue closes automatically when that work ships to the default branch.