zbus-3.0.0

• Tighter tokio integration that allows you to make full use of tokio APIs and disable a bunch of dependencies, when tokio feature is enabled.
• Special support for GDBus on Windows.
• Explicitly require needed Rust version in the Cargo.toml file.
• Socket changes:
  • Drop as_raw_fd method and hence the requirement for implementations to be backed by FD/handles.
  • Add optional uid method to allow implementations to fetch the UID and hence be able to use EXTERNAL auth.
  • Add optional send_zero_byte method for freebsd & dragonfly platforms. Same reason as above.
• Don't try to get unix socket credentials from TCP sockets.
• OwnerChangedStream now implements Send + Sync + Unpin.
• Only spawn tasks for handing messages that are method calls.
• Add more tracing and debug logging.
• Dependencies bumped:
  • nix 0.24.1.
  • zbus_names 2.2.
  • zvariant 3.6.0.
• Dependencies made optional:
  • async-exector
  • async-task
  • async-lock
  • async-channel
  • lazy_static
• Many other fixes and improvements.