Bump discord-py from 2.2.2 to 2.4.0 (#54)

Bumps [discord-py](https://github.com/Rapptz/discord.py) from 2.2.2 to 2.4.0.
- [Commits](https://github.com/Rapptz/discord.py/compare/v2.2.2...v2.4.0)

---
updated-dependencies:
- dependency-name: discord-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -3,4 +3,4 @@ PlexAPI==4.15.15
 texttable
 python-dotenv
 requests
-discord.py==2.2.2
+discord.py==2.4.0