Fastapi-azure-auth

**Bugfix**

* Python3.9.0 and Python3.9.1 has a bug with `collections.abc.Callable`, so this typing import has been changed to `typing.Callable` ( ravaszf and JonasKs 50 )

**Features**

* `auto_error` flag/setting. When set to `False` an invalid token will return `None` instead of raising exception. ( bkmetzler and JonasKs 44 )
* This flag allows end users to configure multiple authentication paths, and reflects authentication classes shipped by FastAPI.

**Features**

* [Trio](https://trio.readthedocs.io/en/stable/) support, by replacing `aiohttp` with `httpx`( JonasKs #34 )
* Testsuite is now running on both `asyncio` and `trio`, using [`anyio`](https://anyio.readthedocs.io/en/stable/). `aioresponses` has been replaced with [`respx`](https://lundberg.github.io/respx/)
* Since FastAPI version [`0.69.0`](https://github.com/tiangolo/fastapi/releases/tag/0.69.0), `trio` is officially supported

**Fixes**

* Fixes FastAPI version syntax ( bmoore 30 )

**Fixes**

* Loosen FastAPI version requirement, allowing installation of this module on FastAPI 0.70.0+ ( bmoore 28 )
* Add `Python3.10` and `FastAPI==0.70.0` to pipeline matrix ( jonasks 28 )

**Fixes**

* Multi-tenant schema documentation ( 20 sondrelg )
* Multiple errors in the documentation ( 22 daniwk )
* Update `cryptography` requirement to `^35.0.0` and fix imports ( 26 bmoore )