Add a test for ClientSession.version
Add a test for ClientSession.version

hellysmile/aiohttp,z2v/aiohttp,rutsky/aiohttp,mind1master/aiohttp,rutsky/aiohttp,AraHaanOrg/aiohttp,esaezgil/aiohttp,KeepSafe/aiohttp,jettify/aiohttp,esaezgil/aiohttp,rutsky/aiohttp,playpauseandstop/aiohttp,arthurdarcet/aiohttp,panda73111/aiohttp,moden-py/aiohttp,KeepSafe/aiohttp,Eyepea/aiohttp,moden-py/aiohttp,juliatem/aiohttp,esaezgil/aiohttp,panda73111/aiohttp,singulared/aiohttp,alex-eri/aiohttp-1,mind1master/aiohttp,moden-py/aiohttp,panda73111/aiohttp,KeepSafe/aiohttp,z2v/aiohttp,jettify/aiohttp,pfreixes/aiohttp,jettify/aiohttp,singulared/aiohttp,arthurdarcet/aiohttp,mind1master/aiohttp,pfreixes/aiohttp,juliatem/aiohttp,alex-eri/aiohttp-1,alex-eri/aiohttp-1,AraHaanOrg/aiohttp,singulared/aiohttp,z2v/aiohttp,hellysmile/aiohttp,arthurdarcet/aiohttp