- update to 0.4.0:
* Add `usage` argument for `tls.default_tls_context` to control whether the
context is for a initiator or acceptor
* Add type annotations and include `py.typed` in the package for downstream
library use
* Expose the `ContextProxy` class for type annotation use
* Added `get_extra_info` to `ContextProxy` to expose a common way to retrieve
context specific information, this is currently used by CredSSP to retrieve
* `client_credential`: The delegated client credential for acceptors
once the context is complete
* `sslcontext`: The SSL context used to create the TLS object
* `ssl_object`: The TLS object used during the CredSSP exchange
* The `client_credential` property on `CredSSP` has been removed in
favour of `context.get_extra_info('client_credential')
* Added support for custom credential types
* Can be used to for things like NTLM authentication with NT/LM hashes,
Kerberos with a keytab or from an explicit CCache, etc
* Support calling SSPI through `pyspnego`'s Negotiate proxy context
* This allows users on Windows to still use Negotiate auth but with a
complex set of credentials
* Also opens up the ability to use Negotiate but only with Kerberos auth
* The `username` and `password` property on the auth context object are
deprecated and will return `None` until it is removed in a future release