Add Sanic to readme (#10)

* Add Sanic to readme

I feel there are plenty more frameworks that are not on this list yet. Sanic is one I know for sure. :)

* Fix order

README.md

@@ -37,6 +37,7 @@ _Frameworks for building ASGI web applications._
 - [FastAPI](https://github.com/tiangolo/fastapi) - A modern, high-performance web framework for building APIs with Python 3.6+ based on standard Python type hints. Powered by Starlette and Pydantic. Supports HTTP and WebSockets.
 - [Quart](https://github.com/pgjones/quart) - A Python ASGI web microframework whose API is a superset of the Flask API. Supports HTTP (incl. SSE and HTTP/2 server push) and WebSockets.
 - [Responder](https://python-responder.org/en/latest/) - A familiar HTTP Service Framework for Python, powered by Starlette. (ASGI 2.0 only, ed.)
+- [Sanic](https://sanicframework.org/) - Sanic is a Python 3.6+ web server and web framework that's written to go fast. It allows the usage of the async/await syntax added in Python 3.5, which makes your code non-blocking and speedy. Supports HTTP and WebSockets.
 - [Starlette](https://www.starlette.io/) - Starlette is a lightweight ASGI framework/toolkit, which is ideal for building high performance asyncio services. Supports HTTP and WebSockets.
 
 ## Libraries