🔖 Release 0.4.0

• ⬆️ Upgrade dependencies:
  • zbus 5.0.
  • anyhow 1.0.90.
  • clap 4.5.20.
  • futures-util 0.3.31.
  • serde 1.0.210.
  • tokio 1.40.0.
  • xdg-home 1.3.0.
  • console-subscriber 0.4.0.
  • enumflags2 0.7.10.
  • event-listener 5.3.1.
• 🛂 Drop auth-mechanism CLI arg. It's now automatically chosen for you, based on the socket type
  in use. For UNIX sockets and for TCP on Windows, we use EXTERNAL. For TCP sockets on
  non-Windows, we use ANONYMOUS (i-e no authentication at all). On Unix machines, people should
  use the UNIX socket anyway and if EXTERNAL is possible, it's best to stick to it. dbus-broker
  also doesn't support anonymous authentication and since they only support Unix sockets for
  transport, it means they don't support anonymous authentication at all.
• 🛂 Drop support for DBUS_COOKIE_SHA1 auth mechanism. This is in conjunction with zbus dropping
  it in 5.0. Besides, I added this support mainly for hopes of possibly using it for a remote
  transport. However, due to lack of time and funding, I decided to drop those plans from the
  roadmap.
• Exclude duplicate license file.