v0.3.0

MINOR Changes:

• Adds semaphore operation mode to Event

PATCH Changes:

• Fixes a bug that sometimes caused a read outside a valid iterator range when cancelling I/O
• Fix for timer to allow zero duration timeouts. This bypasses the I/O wait and posts the completion immediately.
• Fix: Ensure the event interest flags (EPOLLIN, etc.) are reset after processing I/O for notified FDs
• Fixes a potential deadlock when cancelling I/O in completion handlers
• Fix to I/O rescheduling to avoid an extra loop when determining the updated interest flags
• Adds missing cancel() operation on Event
• Fixes a bug where the signal details weren't being returned in the signal wait completion result
• Fixes a deadlock that can happend when io-based and non-io-based operations are queued