Log Message:
py-aiohttp: updated to 2.3.5

2.3.5:
Fix compatibility with pytest 3.3+

2.3.4:
Make request.app point to proper application instance when using nested \ 
applications (with middlewares).
Change base class of ClientConnectorSSLError to ClientSSLError from \ 
ClientConnectorError.
Return client connection back to free pool on error in connector.connect().