v2.0.0-alpha.1

🚀 What's New

• #45, #50 Removed deprecated default implementations of Reactor for Option and mpsc::Sender.
• #46 Restricted Reactor to always return Result and to bind to &mut self.
• #49 Any type that implements Sink may now be transformed into a Reactor using Reactor::from_sink.
• #50 Integration with futures-rs (feature async) is now enabled by default.
• #52 Reducer may now be used in #[no_std] environments.