Build(deps): Bump aiohttp from 3.6.2 to 3.7.4

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.6.2 to 3.7.4.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](https://github.com/aio-libs/aiohttp/compare/v3.6.2...v3.7.4)

Signed-off-by: dependabot[bot] <support@github.com>
1 job for dependabot/pip/aiohttp-3.7.4 in 1 minute and 54 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #2692
test

00:01:54

91.0%