v0.6.0-beta.0

Breaking Changes

• Subsystems can return Err<Into<Box<dyn Error + Send + Sync>>> instead of Err<Into<anyhow::Error>>
  • Allows all error types that can be converted to Box<dyn Error + Send + Sync>
  • Should be compatible with existing code, but increases compatibility with new error handling crates
• Toplevel::handle_shutdown_requests can now return all types that implement From<GracefulShutdownError>, which should integrate seamlessly with most return types from main(), like anyhow::Result, Box<dyn Error> or eyre::Result