Bump aiohttp from 3.8.5 to 3.9.0 (#221)

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.8.5 to 3.9.0.
- [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/v3.8.5...v3.9.0

)

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

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requirements.txt

-aiohttp==3.8.5
+aiohttp==3.9.0
 beautifulsoup4==4.12.2
 discord.py==2.3.2
 emoji==2.8.0