Convert request_url to yarl.URL object.
Convert request_url to yarl.URL object.

If parameter passed to filter_cookies is a string, the method fails.
Convert the request_url to expected URL object. If URL object is
passed as a parameter, everything still works as expected.

juliatem/aiohttp,rutsky/aiohttp,alex-eri/aiohttp-1,pfreixes/aiohttp,singulared/aiohttp,AraHaanOrg/aiohttp,pfreixes/aiohttp,juliatem/aiohttp,AraHaanOrg/aiohttp,rutsky/aiohttp,arthurdarcet/aiohttp,KeepSafe/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp,Eyepea/aiohttp,KeepSafe/aiohttp,arthurdarcet/aiohttp,arthurdarcet/aiohttp,singulared/aiohttp,singulared/aiohttp,alex-eri/aiohttp-1,hellysmile/aiohttp,hellysmile/aiohttp,alex-eri/aiohttp-1,playpauseandstop/aiohttp