chore(deps-dev): bump aiohttp from 3.8.5 to 3.8.6 (#1348)

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.8.5 to 3.8.6.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiohttp@v3.8.5...v3.8.6)

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.dev.txt

@@ -1,4 +1,4 @@
-aiohttp==3.8.5
+aiohttp==3.8.6
 black>=20.8b1
 bump2version==1.0.1
 covidcast==0.1.5