Tests

New transport AIOHTTPWebsocketsTransport #705

Job	Run time
build (3.7, ubuntu-20.04)	2m 22s
coverage	50s
build (3.8, ubuntu-20.04)	2m 28s
build (3.8, windows-latest)	2m 52s
build (3.9, ubuntu-20.04)	2m 20s
build (3.10, ubuntu-20.04)	2m 20s
single_extra (aiohttp)	17s
build (3.11, ubuntu-20.04)	2m 16s
single_extra (requests)	17s
build (3.12, ubuntu-20.04)	2m 29s
single_extra (httpx)	18s
single_extra (websockets)	33s
build (pypy3.8, ubuntu-20.04)	4m 25s
single_extra (aiohttp_websockets)	12s
	23m 59s

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