aiohttp 3.7.3 release

Features

• Use Brotli instead of brotlipy
  #3803 <https://github.com/aio-libs/aiohttp/issues/3803>_
• Made exceptions pickleable. Also changed the repr of some exceptions.
  #4077 <https://github.com/aio-libs/aiohttp/issues/4077>_

Bugfixes

• Raise a ClientResponseError instead of an AssertionError for a blank
  HTTP Reason Phrase.
  #3532 <https://github.com/aio-libs/aiohttp/issues/3532>_
• Fix web_middlewares.normalize_path_middleware behavior for patch without slash.
  #3669 <https://github.com/aio-libs/aiohttp/issues/3669>_
• Fix overshadowing of overlapped sub-applications prefixes.
  #3701 <https://github.com/aio-libs/aiohttp/issues/3701>_
• Make BaseConnector.close() a coroutine and wait until the client closes all connections. Drop deprecated "with Connector():" syntax.
  #3736 <https://github.com/aio-libs/aiohttp/issues/3736>_
• Reset the sock_read timeout each time data is received for a aiohttp.client response.
  #3808 <https://github.com/aio-libs/aiohttp/issues/3808>_
• Fixed type annotation for add_view method of UrlDispatcher to accept any subclass of View
  #3880 <https://github.com/aio-libs/aiohttp/issues/3880>_
• Fixed querying the address families from DNS that the current host supports.
  #5156 <https://github.com/aio-libs/aiohttp/issues/5156>_
• Change return type of MultipartReader.aiter() and BodyPartReader.aiter() to AsyncIterator.
  #5163 <https://github.com/aio-libs/aiohttp/issues/5163>_
• Provide x86 Windows wheels.
  #5230 <https://github.com/aio-libs/aiohttp/issues/5230>_

Improved Documentation

• Add documentation for aiohttp.web.FileResponse.
  #3958 <https://github.com/aio-libs/aiohttp/issues/3958>_
• Removed deprecation warning in tracing example docs
  #3964 <https://github.com/aio-libs/aiohttp/issues/3964>_
• Fixed wrong "Usage" docstring of aiohttp.client.request.
  #4603 <https://github.com/aio-libs/aiohttp/issues/4603>_
• Add aiohttp-pydantic to third party libraries
  #5228 <https://github.com/aio-libs/aiohttp/issues/5228>_

Misc

• #4102 <https://github.com/aio-libs/aiohttp/issues/4102>_