Breaking Changes

• HotplugMonitor no longer implements Iterator, but now implements IntoIterator.
• HotplugMonitor now yields HotplugEvents instead of already-opened Evdevs.
  • Call HotplugEvent::open to open the device.
• hotplug::enumerate has moved to enumerate_hotplug in the crate root.

New Features

Async

EventReader now allows reading events and reports via async.
This functionality requires enabling either the "tokio" or "async-io" Cargo features.

Note that a lot of evdev functionality cannot be made async and will always block.
Only reading events asynchronously via the EventReader is supported for now.

Other Changes

• FreeBSD: sleep after connecting to devd to ensure no events go missing.
• Mark some methods #[inline] for more efficient code generation.
• Don't redundantly invoke fcntl if the non-blocking status is already what we want.
• Implement AsFd and IntoRawFd for HotplugMonitor.
• Include device path in error message if opening fails.
• Add Report::len, returning the number of events in the Report.
• Device enumeration iterators have been made real types instead of impl Iterator and moved to
  the enumerate module.