Httpy

Fixed the async ALPN system

**Full Changelog**: https://github.com/jenca-adam/httpy/compare/v2.0.2...v2.0.3

_This update fixes bugs._

What's new

- Added more sslobj extraction methods because it was failing.
- Reworked `Dir` functionality

**Full Changelog**: https://github.com/jenca-adam/httpy/compare/v2.0.1...v2.0.2

_This update fixes bugs_
Fixed installation bugs (forgot to include a module in setup.py)

**Full Changelog**: https://github.com/jenca-adam/httpy/compare/v2.0.0...v2.0.1

_This update **adds new features**. Please read the description below for further details._

Added HTTP/2 support. The HTTP version is negotiated using ALPN, so you don't have to make any adjustments to your code unless you specifically want to use HTTP/1.1. Consult the documentation for more information.

Asynchronous requests added.
Sessions added.
Debugger fixed.

What's Changed
* 2.0 finished by jenca-adam in https://github.com/jenca-adam/httpy/pull/1


**Full Changelog**: https://github.com/jenca-adam/httpy/compare/v1.8.2...v2.0.0

_This update **adds new features**. Please read the description for more details_

Things that are new:

- `force_keep_alive` attribute of `request()` added. If set to `False`, HTTPy will retry request upon connection in keep-alive mode being closed.


v1.8.1-fixed

:bug:_This update is a **bugfix**. That means that no changes to the API took place._
Fixed documentation on httpy.readthedocs.io as it was not rendering the Sphinx autodoc properly.
Things that are new:
- Removed setting `context.post_handshake_auth`, as I don't intend to implement it in the future, and it caused the required Python version rise from 3.6 to 3.8