Bump aiohttp from 3.6.0 to 3.7.4 in /.circleci#22

dependabot[bot] wants to merge 1 commit intomasterPynterest/backend:masterfrom

dependabot/pip/dot-circleci/aiohttp-3.7.4Pynterest/backend:dependabot/pip/dot-circleci/aiohttp-3.7.4Copy head branch name to clipboard