🚨 Breaking Changes

• Drop Python 3.8 support: The minimum required Python version is now 3.9+.
• Remove Curio support: The curio asynchronous backend has been completely removed.
• Change AnyIO Proxy.connect return type: The connect method now returns a native anyio.abc.SocketStream instead of a custom wrapper.

🚀 Features

• Add proxy chaining support: Introduced an optional forward parameter to the __init__ method of all Proxy classes to enable chaining.

🧹 Refactoring & Clean Up

• Remove deprecated proxy chains: Deleted the legacy, deprecated implementation of proxy chaining.

🛠 Typing & Quality

• Full mypy type-checking support: The entire codebase is now strictly type-annotated and fully compliant with mypy.

Fix socks5 reply reading by @rigens (#46)

Add ProxyException base class

Avoid leaking an open socket (trio) by @aaugustin (#44)

Close socket on loop.sock_connect(...) error by @aaugustin (#40)