Fix aiohttp deprecation warnings (#13240)

homeassistant/components/ring.py

homeassistant/helpers/aiohttp_client.py

tests/components/alexa/test_flash_briefings.py

tests/components/alexa/test_intent.py

tests/components/alexa/test_smart_home.py

tests/components/camera/test_generic.py

tests/components/camera/test_local_file.py

tests/components/camera/test_mqtt.py

tests/components/cloud/test_http_api.py

tests/components/config/test_config_entries.py

tests/components/config/test_core.py

tests/components/config/test_customize.py

tests/components/config/test_entity_registry.py

tests/components/config/test_group.py

tests/components/config/test_hassbian.py

tests/components/config/test_init.py

tests/components/config/test_zwave.py

tests/components/device_tracker/test_geofency.py

tests/components/device_tracker/test_locative.py

tests/components/device_tracker/test_meraki.py